If you have a Last.fm account, there is a pretty cool option called 'Paste Your Taste' which basically generates a list of your favorite bands so you can post them on Facebook, Twitter, blogs, etc. I most recently discovered this option and had it generate my list of favorite bands. Check em' out below.
Deftones, The Murder City Devils, Monster Magnet, Machines of Loving Grace, Megadeth, Tesseract, Tool, Quasimoto, Slipknot, Red Hot Chili Peppers, Burial, Danzig, Dozer, Korn, Bochum Welt, Madvillain, Bush, System of a Down, Limp Bizkit, Motörhead, Mudvayne, Hatebreed, Fellsilent, Kyuss, Rage Against the Machine, Drowning Pool, Dudley Perkins, Interpol, The Sword, Team Shadetek, Live, Godsmack, MF DOOM, P.O.D., Gang Starr, The Verve, Madlib, Lootpack, Siouxsie and the Banshees, Radiohead, Black Sabbath, Legowelt, Black Moon, Linkin Park, The Pharcyde, Porno for Pyros, Foo Fighters, UNKLE, Pete Rock, Portishead, Aphex Twin, DJ Krush, The Smiths, Diplo, Giorgio Moroder.
Also, while you're at it check out this website which allows Last.fm users to generate banners with all your favorite band logo's so you can paste anywhere. You can have it generate your overall favorite bands which you play frequently or your favorite bands from 3 or 6 months ago. I generated one from my most recent favorite bands and below is the outcome. Dope!