Nirvana and Pearl Jam make a different type of music.. apparently you don't like it but it doens't make it bad. Personally, I love Nirvana and hate Pearl Jam. I also like a lot of the "true" bands you listed but I'm not a huge Zeppelin or Metallica fan.
Roadrunner, do you realize you probably sound the same as your dad when he said rock and roll was for hooligans who can't appreciate real music?
"Jack, will you call me, if you're able?"
"I've got your phone number written, in the back of my Bible."