"I could do 6 of the sixties...
the beatles
the who
hendrix
bob dylan
Crosby, Stills, and Nash
and the rolling stones"
- Solid, no complaints here.

"I could do 6 of the seventies... (no repeats from above)
Led Zeppelin
Pink Floyd
Fleetwood mac
Black Sabbath
The Clash
The Doors"
- ...No Lynnard Skynnard? Replace The Doors with it.

"I could do 6 of the eighties...
Metallica
Bruce Springsteen
Guns and Roses
U2
Van Halen
Sonic Youth"
- Eh? Dump U2 and replace with Def Leppard. We can do without Springsteen, put Slayer in there.

"I could do 6 of the nineties...
Pearl Jam
Alice in Chains
REM
Nirvana
Red Hot Chili Peppers
Smashing Pumpkins"
- Drop Pumpkins. Put in Stone Temple Pilots. Drop Nirvana, I've found that, outside of a few songs, they're overrated. Put in X Japan.

"And even 6 in the shitty 00's
Radiohead
My Morning Jacket
Bloc Party
Coldplay
Wolfmother
The White Stripes/Raconteurs"
- Radiohead? Dude, Radiohead's best stuff was in the 90's. Drop Coldplay, insert Dragonforce. Drop My Morning Jacket, insert Coheed and Cambria. I dislike The White Stripes, insert Jonathan Coulton (google it). Bloc Party? Never heard of them. Replace with Foo Fighters. They've put out some very solid stuff in the past 8 years. And, finally, remove Wolfmother, insert Dethklok.