Musicians?
baddox: Took piano lessons until 8th grade, in 9th grade picked up guitar on my own, learned to play by ear, I'm pretty decent albeit a casual player.  I don't play in bands much, just jam around with friends, and I know I don't have the chops to be a professional.  Music is a great thing to geek out with, you can really be a music gearhead just like with computer equipment.  I'm especially interested in digital audio workstation (DAW) technology, it's a perfect blend of computer science and music.