I'm just going to name some off the top of my head and I know I'll miss a lot.

Atreyu
Hawthorne Heights
Vertical Horizon
Unwritten Law
MXPX
Queen
AC/DC
Guns N' Roses
Aerosmith
Led Zepplin
Lynard Skynard
Eagles
Dashboard Confessional
Death Cab for Cutie
Nirvana
Metallica
Saliva
System of a Down
Red Hot Chille Peppers
The Used
Fall Out Boy
Weezer
My Chemical Romance
Toby Keith
Alan Jackson
Keith Urban
Kenny Chesney
Rascal Flatts
3 Doors Down
Godsmack
Nickleback
Audioslave
The Who
Counting Crows
Tool
Sublime
Tenacious D
Ash Wednesday
Styx
ZZ Top
Breaking Benjamin
Three Days Grace

And I realize the list could go on, but rather than waste bandwidth, I'll just say I listen to a lot of everything.