Not going to join the bandwagon about how this thread sucks.
Anyway, some 90's bands (or at least bands that thrived/started in the 90's) that I like:
-Tool
-Foo Fighters
-Nirvana
-Soundgarden
-Pearl Jam
-Green Day
-Blink 182
-The Offspring
-Red Hot Chili Peppers (started in the 80's, but got really big in the 90's)
-Metallica (more or less)
-U2
-Korn
-Creed
-Smashing Pumpkins
-Radiohead
-Alice In Chains
-Nine Inch Nails
-Rage Against The Machine
-Guns N Roses (more or less)
-Kenny Wayne Shepherd Band
-Pantera
-Stone Temple Pilots
-My Bloody Valentine
-Lenny Cravitz
-R.E.M.
Yes, I'm one of those "mainstream" lovers. Goa head and label me. If i created a list for my favorite 2000 bands, I think it'd only be about half as long, if that. The 90's has to be my favorite decade as far as music goes, with the 70's coming in at a close second. The 60's probably come in at nearly a tie with the 70's, the 00's a good fourth, and let's just forget about the 90's.