The tricky thing becomes: Do you know yourself well enough to then portray that on screen? And for me, I find that really hard. I'd rather hide behind accents and funny walks.

Basically you want as many people as possible to see your movie.

I have a lot of ideas that I feel are half-formed, or half-way okay.

I'm on the list that I thought I'd never be on. I'm not sitting here thinking, 'God, I might get this part' or 'is it too late for me to play Hamlet?' It's really about: who do I get to work with? There's so many people on that list.

Sometimes, the smaller roles in movies can be the most interesting. If you only take the stance that you'll only play central characters in movies, you'll find yourself not being able to indulge in that morally grey terrain that makes support characters so rich and interesting.

It feels good to be fit and strong.

Whenever you deal with science fiction you are setting up a world of rules. I think you work hard to establish the rules. And you also have to work even harder to maintain those rules, and within that find excitement and unpredictability and all that stuff.