to those who don't know about last.fm, it's a website that tracks your musical tastes/preferences, shows you who/what you listen to most/least, gives you reccomendations on bands/artists, gives you a musical compatibility score compared to your friends/other users, and probably many other things
here's my musical profile (add me as a friend!): http://www.last.fm/user/vinnyyang
note: my playlist is currently set to play random songs so it's not properly skewed towards my true preferences but that will show over time