When I was younger I saw a movie called 'Butch Cassidy and the Sundance Kid' with Paul Newman and Robert Redford. Those two actors and that movie was my inspiration to want to be an actor.
I think it's necessary to identify with anything - with any character you play, there's got to be something in common, so you can link up to that person, even if it's like one tiny thing. But it's equally fun to play somebody completely different, and trying to find what that thing is to make it.