Johnny Cash , Hank Willams I, II and III, David Allan Coe, Jr. Brown, Disturbed, Primus, Frank Zappa and the Mothers, Hed Pe, Sacred Reich, Pink Floyd, Blood Rock, Pantera, Puya, Slayer, Lamb Of God, Metallica, Sepultura, Ronnie James Dio, Anthrax, Megadeth, Black Sabbath, Fear Factory, Slipknot, Sevendust, The Dillinger Escape Plan, Mastodon, Motley Crue, Head Automatica, Cephalic Carnage, Killswitch Engage, Kyuss, Korn, Deftones, Brujeria, Napalm Death, Jamiroquai, Juanes, Control Machete, Orishas, Carcass, Candiria, Byzantine, Soulfly, Iron Maiden, Mudvayne, Machine Head, Shinedown, Incubus, Rage Against The Machine, Judas Priest, Exhorder, Sacred Reich, Suicidal Tendencies, Meshuggah, God Forbid, Stuck Mojo, Downset, The Haunted, Crippled Nation, System Of A Down, The Mars Volta, Nonpoint, Skindred, Living Sacrifice, Demon Hunter, Ill Nino, 40 Below Summer, Taproot, In Flames, Static-X, Death Angel, Nevermore, Electric Buffalo, Tool, Faith No More, Poison The Well, Hatebreed, Tesla, Only Living Witness, Shadows Fall, Saliva, Clutch, YOB, Mana, A.N.I.M.A.L., Skid Row, Every Mother's Nightmare, Dangerous Toys, Portishead and Tricky, ozzy. There is alot I have not added, just tooooo much.