Most of the real bad guys in the world are people like you and me; they're not stupid, and you can't smell their horns.
I find myself going to places where I really have no business, speaking to these people in a whole other field that I have no extensive knowledge of. But I do it very often because it scares me.
I always play these rodent type characters - skittish and hyper like a chipmunk. It's a complete act though. I'm a very normal person.