I am a social person by nature.
With my friends and family...
With that said, I'm generally a slam clicker on overnights for many reasons, one of which is the potential for something bad to happen because of some crazy nut-job who I work with. I have a vivid enough imagination to know that SOME people are crazy enough to cause BIG problems in a co-workers life. No thank you.
Not only that, but I typically like to do my own things on my own time when not on duty. Tough to do by committee.