If you know what it is before you even start, it's not as interesting. Central to being an actor is pretending, and the adventure of it all. That's why you become a junkie for different kinds of situations. I try to attach myself to people who really inspire me, and directors who are really passionate. That way, I can give myself more fully and trust the impulse behind why the film is being made, and I can be a little more irresponsible in finding out what the character is. I have to worry less about what the character means if I trust the director.