I know some people's favorites, not everyones though. I'll start out
First and above all others are my boys:
Pearl JamI've been to two of their shows and am lucky enough to go three more times this summer. All of the crap they go the extra mile for with us the fans is amazing. Full concert bootlegs a week after the show for $15 a piece. Charging standard price for floor seats in the front few rows. Christmas Records every year. $13 for T-Shirts at the show and I could go on and on.
Beyond them I really enjoy Grunge
Soundgarden
Nirvana
Alice in Chains
Stone Temple Pilots
And then these bands or solo acts also tickle my fancy
The Beatles
Led Zeppelin
Guns n' f'n Roses
Smashing Pumpkins (and Zwan)
Dave Matthews Band
Ben Harper
Natalie Merchant
The Who
Neil Young
The Black Crowes
Radiohead
U2
Nat King Cole
Bing Crosby
Blind Melon (highly under rated)
And then let's not forget Jazz
Miles
Coltrane
Monk
Getz
Mingus
Brubeck
Guilardi
We can do bands you hate later on