Improvisation, the main thing is it teaches you to be in the moment and present in the moment and be reactive and proactive for what's going on. Someone gives you something - a lot of actors are a little shut off, so they're just doing, "This is my character, these are my lines, I'm going to just send it to you then you send whatever you're sending." Improvisation teaches you to really be listening.
John C. ReillyUnless you do the same thing, it's tough for stereotypes to stick. That said, whatever you've done that's most popular at a given moment is what people think "you do."
John C. ReillyMovies are this thing that came into my life, and it still feels pretend in some way. I kind of do this thing, and I never really accepted this idea that I'm a film actor. That's what I do. I feel like I'm a theater actor that started doing films. Most people have never seen me in a play. They're fun, though.
John C. Reilly