John Frusciante, Dimebag Darrell, Paul Wagonner, Alexi Laiho, and other various guitar players. I also think Chuck D would be pretty cool, but he might beat me up.
A few of my favorites are: Coldplay, Weezer, Metallica, Red Hot Chili Peppers, Rage Against the Machine, T00L, PANTERA , John Frusciante, Smashing Pumpkins, various Jazz and Classical guitar, and lots of other bands.