Its odd that you sometimes see a band and not know the significance until much later on, I was asked by a friend back in '91 if I wanted to go with him to see a band, I could vaguely remember seeing them back in the August at the Reading festival... but it was £6 and I had nothing better to do, it was noisy, very loud and the lead singer jumped off the stage and almost landed on me..a scruffy converse trainer brushing the side of my head....I must admit to only ever being a casual Nirvana fan, but its one of those bands that when I mention I saw them live twice folks look at me like Ive just told them I met Jesus.
As for bands/ artists I wish Id seen, I have a few, either because they were 'before my time' or I had chance to see them but for whatever reason didnt and regret not seeing them live
Freddie Mercury/Queen
James Brown
The Beatles
Elvis
Hendrix
The Doors
There are other bands that although the members are still here there is little chance of them reforming so the 'band' is dead like The Jam, Oasis or The Smiths..Id also add The Verve to this list but they have a habbit of reforming...