Nirvana - Most important band of my generation. Hands down.
U2 - Best. Band. EVER.
Dave Matthew Band - I'm very selective about what I like...mostly the older stuff. When it's good, it's amazing...the rest: meh.
Bands That Rock My World!
the who ~ my other ultimate ~ sans john and keith though when i saw them
Kiss Band Not a fan but cannot discount the live shows and influence they are responsible for