I have a fun mind, thinking of things and seeing the world in ways very alien to most people. I love learning and improving myself, especially in abstract areas. I change extremely rapidly, as my personality is rather modular and I'm adept at controlling my thoughts. I can wear sets of "personas", or outer "mental shells" / "personalities" rather easily and with some comfort, and reprogram them over time, which facilitates absorbing some traits and beliefs into my core mental system.
I've recently begun learning about applied rationality and cognitive psychology, and have found them to be incredibly fascinating and useful. The subject seems relevant to almost all that I find most interesting and fun. It turns out I've been an amateur rationalist and reductionist my entire life, but had not yet learned enough to know that I was (big thanks to LessWrong.com for fixing that!).
Overall, I'm a geeky philosopher, amateur programmer (because I've never had a serious project or actually worked as a coder), avid learner, and downright awesome and fascinating person to be with - as long as you don't feel intimidated or find me arrogant and pretentious.
(Translation: Trying to find a way to do useful science without wasting years getting a Ph.D. I have a grudge against the current educational system.)
Breaking peoples' minds. Especially strangers.
Sideways thinking. Because you don't know you're in a box until you figure out that there's always a box somewhere around you.
Reading some sort of book.
Playing various videogames, either for fun or mental training (usually both).
Often, all of the above throughout the evening and night.
I'm a pretty cool guy and I'm comfortable dealing with very awkward people, so do your worst!