It's easy for me to play bad guys because it's a very linear acting. Bad guys aren't empathetic. Being a bad guy is great because you're not friendly and you don't have to do much with your face.
You want to meet a bunch of really friendly people? Go to a Slayer concert. There'll be some real psychos there, but most of those people will take care of each other.
Canadians are often a friendly bunch.
As far as I have been able to understand, the Japanese seem to keep things close to the vest. Friendly but remote and polite to the point of being invisible. It is in the music, literature, film and art that the Japanese really seem to express themselves.