I have experienced some of the greatest:
Black Sabbath, Iron Maiden, Motorhead, Judas Priest, Kiss, Deep Purple, AC/DC, Ozzy Osbourne, Helloween, Accept, Guns n Roses, Alice Cooper, Def Leppard, Saxon, W.A.S.P, Metallica, Megadeth, Whitesnake, Nazareth, Scorpions, Status Quo, Uriah Heep, ZZ Top, Slayer, Anthrax, Anvil, Queensryche, Europe, Backstreet Girls, etc.
Band I hope to see before it's too late:
Skid Row, Motley Crue, Manowar, Rolling Stones, Aerosmith, Warlock, Cinderella, Ted Nugent, David Lee Roth, etc.
The legends I never got to experience..
Van Halen, Thin Lizzy, Gary Moore, Dio, Ramones, Rainbow, Twisted Sister, etc.