XboxMaster
CAGiversary!
For me, it's Nirvana. I know it's wierd 'cause most of their songs aren't exactly positive, but whenever I'm down I pop in one of their CD's and I feel a lot better.
Damn, I was coming in here to post Pixies and They Might Be Giants, too. Good for you. Also, throw in The Vandals and The Ramones.