I no particular order...
*takes deep breath*
Pink Floyd, Led Zeppelin, George Thoroughgood, Charlie Daniels' Band, Who, Styx, Metallica, Rush, Tenacious D, Miyavi, old-school Green Day, Iron Maiden, Black Sabbath, Jethro Tull, Doors, Beatles, Guns n' Roses, various trance artists and songs (spend time at work listening to Area-63 on Sirius Satellite Radio), remixes of old-school NES/SNES games (I'm a nerd, remember?), AC/DC, Bloodhound Gang, Electronic Light Orchestra (ELO), The Pillows, Journey, Kansas, MC Chris, Minbosses, Weird Al Yankovic, Gary Glitter Band (okay, so really only Rock and Roll: Part 2, but whatever
), Offspring, Trans-Siberian Orchestra, Zeratul (trance/techno), Animals, Apocalyptica...
How's that for an eclectic list?! I range from 80's hair, to old-school nerd, to current techno, to japanese heavy metal...