My friends tell me I can be very witty, I generally find that's only the case when I don't try too hard (at least that when they laugh the most). I have a somewhat dry/sarcastic sense of humour which sometimes teeters on the edge of the surreal.
I like to think of myself as a realist (but I know some people would consider me a pessimist), but even when things go wrong I can often find a sort of ironic, grim amusement from it.
I'm a bit of an introvert, I find large social group to be exhausting, and I tend blend into the background, but I do like to spend time with good friends and have long rambling conversations that when you reach a natural pause, you sometimes wonder how the heck you ended up talking that. I know tons of useless information, unfortunately because it's useless, it's not particularly useful in pub quizzes (darn it all)