This is from a post at the Film board, about music in general. My best lists may change over time.

Favorites (first two in order)
1) Nirvana
2) Neil Young
Black Sabbath
Metallica
The Doors
Radiohead
Bob Dylan
The Cure
The Jimi Hendrix Experience
Led Zeppelin

It was hard for me to cut The Velvet Underground, The Sex Pistols, and Iggy Pop/The Stooges from my favorites. My list would be too long if I didn't limit it down to ten.

Best [Bands/No order]
The Beatles
Pink Floyd
The Doors
The Velvet Underground
Led Zeppelin

Best [Solo/No order]
Bob Dylan
Neil Young
John Lennon
Miles Davis
Johnny Cash