There's a period just before you start a movie when you start thinking, I don't know what in the world I'm going to do. It's free-floating anxiety. In my case, though, this is over by lunch the first day of shooting.
I worry from the moment I take a job. I worry about how I'm going to do it, if I can do it... Then I walk on set and the director says, 'Roll', and all of a sudden, all of it disappears and it's all happening, and I relax, and I'm doing what I do, and I'm not even thinking about it.
When I come up against a director who has a concept that I don't agree with, or maybe I just haven't thought of it or whatever, I'd be more prone to go with them than my own because I want to be out of control as an actor, I want them to have the control, otherwise it's going to become predictably my work, and that's not fun.