Music
Metal: Slipknot, Metallica, Spineshank, DevilDriver, Crotchduster, System of a Down, Lamb of God, Burn the Priest, Dream Theater, Facebath (local), Killswitch Engage (old), Meshuggah, Macabre, Soilent Green, Tool, Liquid Tension Experiment, Hemlock, Static-X.
Death metal/grindcore: Nile, Obituary, Decapitated, Fuck... I'm dead, Cannibal Corpse, Vehemence, Broken Hope, Anal Cunt, Slayer, Behemoth, Deicide, Kataklysm, Deadwater Drowning, Chimaira, DETHKLOK!, Death, and just about any other death metal/grindcore band out there. I think black metal is for geeks who aren't even cool enough to play D&D (although I do listen to some of it).
Seen live: Behemoth x2, Lamb of God x2, Fear Factory, Suffocation, Decapitated, Hypocrisy, Killswitch Engage, Beneath the Massacre, Gojira, Dream Theater, Opeth, Between the Buried and Me, Three, Devildriver, Hatebreed, Three Inches of Blood, Devildriver, and probably other shit I can't remember...