Blood Hound Gang and Blink 182 is my current playlist. Some tenacious D in there too. Nothing like killing noobs to Tribute.
Killswitch is great, Lamb of God is for when I really need to get my K/D up.
Serj Tankin, Incubus, Avenged Sevenfold, Celldweller, Cold, Nonpoint and Muse are on my Blunted Dolphin mix.
Bullet with your name on it.