My taste in music is broad, but rock/metal is my favorite. A few of my favorites are:
Metallica (before they sold out and cut their hair)
G&R
Alice in Chains
Ozzy
Pink Floyd
Sepultura/Soulfly/Nailbomb
Drown
Fear Factory
Ministry
Cathedral
Coal Chamber
Pantera
Godhead
Testament (Alex Skolnick is a guitar god, but they have a new lead player now)
Sevendust (liked their first album anyway)
Machinehead
I'll stop there I guess. I also like the classic stuff like Zeppelin, The Stones, etc. and some country like Johnny Cash and Hank jr.