I have the DVD of the TSO show and I'm about your age too. Can't remember a lot of the shows I saw, but some great ones were Cream, Jethro Tull, Yes (with Tull), Rick Wakeman, Deep Purple, Zepplin, Zappa (5 times - one of my heros), Hendrix (another hero), Pink Floyd, Genesis - with Peter Gabriel & later with Phil Collins, Peter Gabriel, Ten Years After, The Allman Bros., ZZ Top (many, many times - home town boys), Ike & Tina Turner, Spirit, The Inner Mounting Flame (w/John McLaughlin), Return to Forever (Chick Corea & the boys), Stanely Clarke (one of the boys), Al DiMeola (another), Heavy Weather, INXS, Van Halen, Capt. Beefheart, Derek & the Dominoes, Joaney Mitchell, Quicksilver Messenger Service, Savoy Brown, T-Rex, Emerson-Lake&Palmer, The Who, Johnny Winter (Edgar to), Janis Joplin, The Greatful Dead, Three Dog Night, AC/DC, Men at Work, David Bowie, Pat Benatar, B.B. King,  and many . . Many more. As I said, can't remember all of them.

"Imagination is more important than knowledge." - Albert Einstein