There is no way I can pick just one...
Hot 'n now: Panic at the Disco
Always: Metallica, the S&M album particularly.
but that's just how I'm feelin' right now, that could change in the hour. I also really enjoy...
Less than Jake, Five Iron Frenzy, O.A.R., Blink, Jack Johnson, Marilyn Manson, Phish, Johnny Cash, Brand New, Atmosphere, Mighty Mighty Bosstones, Pennywish, NOFX, Tech N9ne, Fallout Boy, Foo Fighters, Korn, Jurassic 5, Outkast, Trick Daddy, DMX, Tupac... yeah, pretty much everything, just depends on the mood.