People are usually either pantsers or planners and your characters should reflect that too. It is possible to be a bit of both but one trait dominates. In my case, I'm a planner. I can't imagine life without a list! Job gets done, gets ticked off list and it is satisfying to see I am working my way through what I have to do. But on occasions when it is not possible to plan in advance, I manage well enough doing things "on the fly". So how do your characters manage when having to act in a way that goes against what they would usually do?
Of all the things we have to do daily, we each have our favourites and those things we loathe doing, other things we wish we were better at and so on and our characters should reflect that.