Ugh... You making my choose!? Man, this is going to be a long list. Disturbed, Korn, Nirvana, Tool, Papa Roach, Limp Bizkit, Iron Maiden, Ozzy, Zakk Wylde, Black Label Society, Black Sabbath, Jimi Hendrix, Pink Floyd, All That Remains, Lamb of God, Children Of Bodom, Dragonforce, Amon Amarth, Tyr, Nickelback, Green Day, Sum 41, The Offspring, Linkin Park, Seether, and probably 50 more that I can't remember.