I would say that many bands go through a lot of phases, from stoned soul, out of sight, to trying to recreate their former boogie and not quite ever getting there. Its understandable (because I would also) how some people could not like certain bands that they did not hear during the bands best years which are often their earliest.
With that in mind, IMHO, I would remove from the worst rock band ever list: Pink Floyd, Springsteen (Tenth Avenue Freeze-Out), Grateful Dead (Loved Anthem to the Sun), Dylan, Buffet, Rolling Stones, Grand Funk (Some Kind of Wonderful, I'm Your Captain), Led Zeppelin, Steve Miller (Your Saving Grace) and BDP24, I agree with you on Blue Cheer but I did get into "Summertime Blues" on whatever album it was. Kind of had to be there then for that one.
Just sayin.
