I don't really listen to music for just gutair, but here are my Favorite Groups/Influences.

Bands:
Dream Theater
Pantera
Symphony X
Kings X
Green Day ( Old stuff)
Journey
Earth Wind and Fire
Rush
System of a Down
Queensryche
Arrested Development
Rage Against The Machine
Jackson 5 (Michael jackson, I like the music, not him)

TV Shows:
Simpsons
Family Guy
Malcom ITM
SouthPark
The Apprentice
Fresh Prince of Bel-Air
Sevendust

Artists:
Elton John
Satch
SRV
Stevie Wonder
Jimi Hendrix
Marvin Gaye