I cry all the time, rather embarassing really.
Books, movies (Toy Story 2, in the movie theatre!), when I'm annoyed, sad, frustrated, angry, and strong emotion really. Or being beaten....
Generally trend is towards the end of a hard scene I start bawling. In the aftercare stage I'll sob and whimper for a few minutes, and then perk right up and hit the giddy silly stage. Drove The Guy crazy until he got me fiugred out. It doesn't mean I'm upset, it's just the ultimate in stress release.

I don't like crying in public, I just can't seem to help it. If my body decides it's going to cry there's very little I can do about it. control over those tear ducts would be a nice skill.