Ok lets settle the debate once and for all
On one side we have van halen, zeppelin, gnr, aerosmith, acdc, pink floyd, hendrix, zz top, lynyrd skynyrd, and all of the "hair" bands.
And on the other side we hace metallica, sabbath, iron maiden, judas priest, megadeath, anthrax, motorhead, and all nu metal, and death metal bands.