My favorite stuff to listen to when I'm tattooing is the more melodic pop punk stuff like Screeching Weasel, the Vindictives, the Queers, Jawbreaker, that sort of stuff. But my Ipod seems to have a mind of its own when it's put on shuffle, and will always play the most offensive Too Short or or Kool Kieth song whenever a bunch of soccer moms come in with their 14 year old kids to get piercings or whatever. I have managed to get most of the obnoxiously unfunny rap skits deleted off there though...The only stuff I will occasionally get up and skip the song is for Immortal Technique, who has a few songs that are a bit gnarly for anybody to have to listen too..