I really dig progressive stuff.

Queensryche
Dream Theater
Pink Floyd
Rush
Styx
Iron Maiden
Black Sabbath
Steve Vai
John Petrucci
Old school Metallica
Avenged Sevenfold
Pantera
Godsmack
Eagles

Good blues is always on my Zune

Joe Bonamassa
Stevie Ray Vaughan
BB King
Buddy Guy
John Lee Hooker
Muddy Waters

Southern Rock

Skynyrd
Blackfoot
Atlanta Rhythm Section
Molly Hatchet
Alman Brothers

the list goes on...