As if one could know the good a person is capable of, when one doesn't know the bad he might do.
I think every character actor at some stage likes to carry a film. It can be extremely liberating to just come in for a scene or two and do your thing. But I find it frustrating if I'm just doing little bits here and there for too long.
My M.O. over the years is that I make things better, where people give me that freedom.