As human beings, of course, we're all compromised and complex and contradictory and if a screenplay can express those contradictions within a character and if there's room for me to express them, that's a part I'd love to play, so much more than a character who is heroic and one-dimensional.
I think when your image becomes so big that it's hard for a viewer to see a character, then I think you're in danger as an actor of being unable to perform what you should be doing.
I think any role you need to play not so much transforms but I like to think of it as understanding the psychology of another character.