The Big Five personality traits in psychology are openness, conscientiousness, extraversion, agreeableness and neuroticism. Of course, these are the most basic – each trait correlates to a cluster of related and more specific traits.
Every person possesses these traits to some degree and the traits fluctuate in intensity throughout our lifetimes. In other words, we do have some control over how intensely each trait manifests itself.
However, as just about everything in relation to psychology and consciousness, it’s much more complicated than that. To keep things simple, each trait has a natural or comfortable resting state.
The traits do have some elasticity, but as with all things, there are limits.
Pushing certain traits further than they are naturally inclined to be affects all the other traits – supplementing some and decreasing the prominence of others.