I've been motivated by overcoming challenge and overcoming the hurdles and obstacles that face me. There still is plenty out there to get motivated by.
One of the most difficult things everyone has to learn is that for your entire life you must keep fighting and adjusting if you hope to survive. No matter who you are or what your position is you must keep fighting for whatever it is you desire to achieve.
I think of myself as a problem-solver. I want to go in and help the director and the writer to get the best they can out of the text they're working with.