I don't know if I've ever played a character who's close to me. There have been some elements of myself in different roles. Sometimes, I show one side of myself and then completely conceal the other. ↗
I think that the best way to explain that is that my mother gave me all the color and character and flare and liveliness, and my father gave me all the sanity and nature and all the things that helped me be a more rounded human being. ↗
I think the character does tend to suit an episodic thing, because what's fun about him is that he doesn't care about anyone else, and it's very difficult for a main character - a lead character - in a movie to not care about anybody else. ↗
It's the difficulty we had with Mr. Bean, actually, when it went from TV to film. You certainly discover that you need to explain more about a character. ↗