I don't function in chaos.
By that I don't mean that I need everything perfectly tidy and orderly and regimented; I don't have OCD, and yes, there's such a thing as TOO orderly that can make me twitchy as heck.
But I need things and processes and routines and plans to be reasonably orderly and predictable....even if the "predictable" part is "we're going to do this, that, and free-float on whether to do the other thing."
And it's not a judgment issue: some folks appear to thrive in chaos. They do wonderfully well in an environment where everyone does whatever they want to, working at cross-purposes, ignoring each other, no communication, as if each other isn't even there.
More power to 'em. But I've learned that I don't. And I don't mean "don't function well"; I mean "don't function" period.
It depends, of course, on how chaotic the situation is. I can slowly cease to function, or I can freeze almost immediately, if it's chaotic enough.
And it's not the appearance of chaos that I react to, as near as I can tell. I've been in situations that appear to be utterly chaotic, but a few moments watching the people will tell you that you're seeing an orderly but intense multi-tasking organism. I've even been a part of some of those---try backstage at any functioning theatre.
It's a combination of non-predictability and lack of communication I react to. The "nobody has a clue what's going on, what they're doing, or what anyone else is doing, and they don't give a damn that they have no clue, or see why you'd want one" syndrome.
It doesn't matter WHY I don't function in it. What matters is knowing that I don't. It's not good, it's not bad, it just is. And so I learn how to avoid it as much as possible, and how to extract myself gently when I happen to find myself in it.
It's a good lesson to learn. And I'm happy with it.