There are people we understand almost immediately.
Conversation flows. Their reactions make sense. We seem to agree on things like how much planning is enough, whether a disagreement needs settling now, whether a weekend should be spent surrounded by people or recovering from them, etc.
Then there are other people.
They may be perfectly decent and well-intentioned, yet interacting with them can feel strangely hard. They talk when we want silence. They improvise when we want a plan. They worry about things that barely register with us, or remain calm about things that keep us awake at night.
At times, we can feel oceans apart. Why is this? Understanding personality helps explain it.
What Is Personality?
Psychologists generally use personality to describe relatively enduring patterns in how people think, feel, and behave.
In other words, personality has a degree of stability, which is why people often seem recognisably themselves across different situations and stages of life. But personality is not frozen.
Longitudinal research shows that traits can change across adulthood, with average shifts in areas such as conscientiousness, emotional stability and social dominance.
Personality also does not dictate behaviour. A quiet person can give a powerful presentation. An anxious person can act with great courage. Situations, habits, values, skills, culture and experience all influence what we do.
Personality is therefore better thought of as a set of behavioural tendencies that we naturally lean on when nothing else is pushing us strongly in a particular direction.
One of the most widely researched ways of describing those tendencies is the Big Five model. Rather than sorting people into a few personality “types”, it describes personality across five broad continua, each with more specific facets. Modern measures such as the Big Five Inventory-2 also look beneath the five broad headings.
The acronym OCEAN makes the five easy to remember: Openness to Experience, Conscientiousness, Extraversion, Agreeableness and Neuroticism.
And those five dimensions can explain quite a lot about why the people around us sometimes seem to inhabit different worlds. Let’s take a brief look at each.
Openness
People who rank higher in openness tend to demonstrate greater curiosity and are often more open to novel experiences.
People lower in openness, on the other hand, often prefer to stick with the concrete and proven, valuing practicality and continuity more strongly.
Imagine, for example, two friends planning a holiday. One wants to book the flights and accommodation for the first night, then see what happens. The other wants accommodation confirmed, routes mapped, and restaurants researched.
The problem begins when each of them turns preference into judgement. One sees rigidity; the other sees irresponsibility. A personality difference has now become a character judgement.
Conscientiousness
Conscientiousness concerns organisation, dependability, persistence and self-discipline. A highly conscientious colleague often brings the checklist, calendar invitation and follow-up email.
On the other hand, someone lower on the trait may work more spontaneously and resist detailed structure.
Put those two people on the same project, and they may complement each other: one creates order, while the other remains flexible when circumstances change.
But they can also drive each other mad.
To the highly conscientious person, missed deadlines may feel disrespectful. To the more spontaneous person, constant planning may feel controlling. Each assumes their own version of “normal”.
Extraversion
Extraversion includes sociability, assertiveness, energy and active engagement with the external world. Higher extraverts often seek stimulation and social contact whilst more introverted people generally need less and may prefer quieter interaction or time alone.
Consider, for example, a couple after a demanding week. One partner says, “We should invite all our friends over on Saturday.” The other partner, who is much lower on extraversion, hears this as a threat to their only recovery time.
The first person may interpret reluctance as antisocial or unfriendly. The second may view the invitation as exhausting and unnecessary.
Nobody has to be wrong.
The difference becomes easier to manage once both people recognise that the same social event can energise one person and drain another.
Agreeableness
Agreeableness reflects tendencies towards compassion, cooperation, trust, politeness and concern for social harmony. Highly agreeable people may instinctively look for common ground and try to preserve relationships.
Less agreeable people are often more willing to challenge, compete, scrutinise and say what they think even when it creates discomfort.
Context matters here.
A highly agreeable person can be a generous friend and supportive colleague, yet may find difficult conversations harder. A less agreeable colleague may seem abrasive but could be the one willing to question a popular proposal before the organisation makes an expensive mistake.
Place both in a meeting, and each may misread the other. One thinks, “Why must you always be difficult?” The other thinks, “Why won’t anyone say what they really think?”
The truth is, both may be contributing something valuable.
Neuroticism
Neuroticism describes a greater tendency to experience negative emotions such as anxiety, worry, emotional volatility and vulnerability to stress.
Some modern Big Five measures use the term Negative Emotionality; others describe the opposite pole as Emotional Stability.
A person higher in neuroticism may notice threats and uncertainties quickly. That sensitivity can prompt preparation, although it can also be uncomfortable.
Someone higher in emotional stability may remain composed under pressure and recover more quickly from setbacks.
Now imagine them receiving a vaguely worded message from their manager: “Can we talk tomorrow?” One barely thinks about it whilst the other constructs six possible explanations before dinner.
In relationships, one partner may want reassurance while the other genuinely believes there is nothing to discuss.
The paradox is that concern can look like overreaction and calm can look like indifference.
So Why Do Some People Simply “Click”?
It is tempting to assume that people with similar personalities will always get along and opposites will always clash.
Research, however, paints a more complicated picture.
A large meta-analysis found that actual similarity was strongly associated with attraction when people had little or no interaction, but its importance weakened as relationships became established. Perceived similarity remained more relevant in existing relationships.
In other words, feeling that another person sees the world in a compatible way may matter more over time than having matching scores on a personality test.
Certain traits also relate to relationship quality.
A meta-analysis of intimate partners found higher satisfaction associated with lower neuroticism and higher agreeableness, conscientiousness and extraversion. Of course, that does not predict the fate of any particular couple. People are more complicated than five scores. It does, however, suggest that some trait-related patterns can make relationships harder to navigate.
Personality at Work
The Big Five also matters at work. Decades of research show that personality meaningfully associates with job performance.
Conscientiousness has produced the most consistent relationship across jobs, and a large quantitative synthesis of more than 50 meta-analyses again found conscientiousness to have the strongest overall association with performance.
The other traits matter differently depending on the work.
For instance, a major second-order meta-analysis of 89,639 workers found stronger links for extraversion in sales and management, agreeableness in healthcare, emotional stability in law enforcement, the military, and skilled or semi-skilled work, and openness in professional occupations.
It is important to note that jobs ask different things of people.
A salesperson, for example, who enjoys initiating conversation and operating in a socially intense environment may find a particular role energising. A technically brilliant person who dislikes continual social engagement, on the other hand, could handle parts of the same role well but find the daily demands draining.
A highly open person may thrive in strategy, innovation, or research where questioning assumptions is part of the work, but become frustrated in a tightly standardised role with little room to experiment.
It is important to note that job fit also extends beyond performance.
Research on person-job and person-organisation fit links stronger fit with outcomes such as job attitudes, performance, withdrawal and tenure.
Personality also relates to job satisfaction.
A major meta-analysis found meaningful associations particularly for lower neuroticism, higher extraversion and higher conscientiousness. A person may therefore be capable of doing a job and still find that it asks them to spend too much of every day swimming against their natural current.
Using The Big 5 in Practice
The greatest value of the Big Five may lie in the conversations it enables.
Instead of saying, “You’re impossible to plan with,” we might recognise a difference in conscientiousness.
Instead of deciding someone is boring because they don't want another social engagement, we might recognise a difference in extraversion. Instead of treating challenge as hostility, we might consider whether agreeableness is shaping how each person approaches disagreement.
Instead of dismissing someone as over-sensitive, we might notice a difference in emotional reactivity.
These small shifts matter as they replace a judgement about who someone is with curiosity about how they tend to operate.
Personality never excuses poor behaviour. “That’s just my personality” cannot justify unreliability, cruelty or refusing to adapt. Mature people learn to manage their tendencies. Good leaders create enough structure for those who need clarity, enough autonomy for those who need room, and enough safety for people to disagree constructively.
We will sometimes be oceans apart from the people we love, work with, manage or live beside. We may want different amounts of stimulation, certainty, novelty, harmony or emotional reassurance.
Until next time, remember that these differences are real. Once we can name them, however, they become easier to navigate.
Dion Le Roux
References
American Psychological Association. (2018). Big Five personality model. APA Dictionary of Psychology.
Barrick, M. R., & Mount, M. K. (1991). The Big Five personality dimensions and job performance: A meta-analysis. Personnel Psychology, 44(1), 1–26.
Judge, T. A., Heller, D., & Mount, M. K. (2002). Five-factor model of personality and job satisfaction: A meta-analysis. Journal of Applied Psychology, 87(3), 530–541.
Kristof-Brown, A. L., Zimmerman, R. D., & Johnson, E. C. (2005). Consequences of individuals’ fit at work: A meta-analysis of person-job, person-organisation, person-group, and person-supervisor fit. Personnel Psychology, 58(2), 281–342.
Malouff, J. M., Thorsteinsson, E. B., Schutte, N. S., Bhullar, N., & Rooke, S. E. (2010). The Five-Factor Model of personality and relationship satisfaction of intimate partners: A meta-analysis. Journal of Research in Personality, 44(1), 124–127.
Montoya, R. M., Horton, R. S., & Kirchner, J. (2008). Is actual similarity necessary for attraction? A meta-analysis of actual and perceived similarity. Journal of Social and Personal Relationships, 25(6), 889–922.
Roberts, B. W., Walton, K. E., & Viechtbauer, W. (2006). Patterns of mean-level change in personality traits across the life course: A meta-analysis of longitudinal studies. Psychological Bulletin, 132(1), 1–25.
Soto, C. J., & John, O. P. (2017). The next Big Five Inventory (BFI-2): Developing and assessing a hierarchical model with 15 facets to enhance bandwidth, fidelity, and predictive power. Journal of Personality and Social Psychology, 113(1), 117–143.
Wilmot, M. P., & Ones, D. S. (2021). Occupational characteristics moderate personality-performance relations in major occupational groups. Journal of Vocational Behaviour, 131, 103655.
Zell, E., & Lesick, T. L. (2022). Big Five personality traits and performance: A quantitative synthesis of 50+ meta-analyses. Journal of Personality, 90(4), 559–573.