I am very lucky that I have managed to see many of the bands that folks here wish they had seen. I saw ACDC on the HIghway to Hell tour with Bon Scott, Led Zeppelin at Knebworth, I saw Pink Floyd on the Animals tour at Stafford Bingly Hall (when I was 9) and later I saw the Wall at Earls Court on two separate occasions. I saw Queen at the NEC in Birmingham, the Dead in Greenville, North Carolina, Toto with Jeff in Toronto, and Stevie Ray in Austin.
I went through a stage of being nervous about going to see older musicians as I seemed to catch many on their last tour before they died. I saw Dizzy, Miles, Michael Brecker and Ray Charles shortly before each of them died.
I do wish, however, that I had seen Little Feat before the death of Lowell George, that I could have seen Jimi, Duke Ellington and John Coltrane. I also am haunted by missing Buddy Rich when he played at the Free Trade Hall in Manchester because I missed the bus and decided not to go. I'll catch him next time, I thought . . . . I also never saw Max or Elvin or Tony Williams. I guess the moral is go to see these folks next time they come around and you won't regret it.