I think Americans like the practical; they like the human. And I like both those things myself, and I try and put them into my books.
I don't plan in terms of career ambitions. The only career ambition I have is to work with people who are going to bring you up and elevate your performance. They'll let you know things that you didn't know already and bring you places that you might not have gotten to otherwise.
But I guess I like playing flawed guys 'cause it gives a place for the characters to go.