I'm trying to figure that out myself right now. I used to be pretty crammed with work, and now that my workload is freeing up I still find myself working as opposed to the things I used to like to do. But some types of "work" i consider entertaining, namely anything abstract/artistic which sometimes can even include code.
I don't watch TV, I don't own a gaming system, that stuff always bored me more than not having anything to do.
So I guess I like to "hang out" in my free time