My humor revolves around noticing the particular mannerisms that people have. The occasional corny pun can be funny in it's cheesiness. I think it's also very important to be able to make fun of oneself.
I have a geeky side to me too, I just don't express it in person unless I'm sure others are interested. I love video games for their imaginative qualities and I also use them to be social. My main game that I play now is League of Legends, but I'm up to play many other games when hanging out with people. Also, I enjoy watching people play games just as much as playing them!