Nirvana is alright, but their music isn't nearly complicated enough to classify them as one of the greatest bands. There are a lot of beginning guitar players that can cover a lot of their riffs. In order for a band to classify as greatest of all time, they have to be well rounded in musical talent, sound, image, live performance etc. I'm going to have to ponder a bit before I can release my "greatest of all time" ideas.
