I find the most satisfaction out of making other people happy, and doing good things. I live around the concept of Karma, and it works for me! Sure, I could be better off in the world, but that's not what life is about.
Basically, I'm usually either working, hanging out with friends or spending too much time in front of my computer. I enjoy some vidya games (and all sorts really, Cards Against Humanity is pretty much the shit), reading science and tech articles (from soft (Wired/Popular Mechanics type) to hard (IEEE Spectrum, Physics Today, etc)), fixing things around the house, bar hopping, coffee, art displays/experiences, mosh pits, movies, theater, cooking, creating cocktails and then some. I easily get caught up in new hobbies. I pick up the guitar now and then, but haven't had much inspiration (or time) to play recently. Workin' on that, but I've been more vocally inclined lately.