I do a lot of theater work. I'd like to do a lot of film work. Here are four great interviews from the MATRIX site talking about what it's really like as a Costume Cutter, Set Designer, Composer, or Unit Director on a film. My favorite is the Costume Cutter interview, I think --- probably because she moved from theater work to film work and I know a lot of theater costume desginers who are right where she was pre-film.
I'm going to be the only MIT PhD working as a gaffer in a Hollywood backlot someday, I can tell.