My first concert was Aerosmith and Nazareth in 1974. Best remembered for the haze of pot smoke hanging all over the arena and the nicely carved pipe that bounced down the stairs from on high and into my lap.
Worst concert was the Stones in 1980. They were clearly not into it and Bill Wyman fell of the stage and ended up in the hospital. Best bang for the buck concerts were Springsteen. He plays forever and you are tired afterwards.
My first concert was Paul McCartney in 2004. I still remember it like it was yesterday. I went and saw him again a couple years ago, and in my opinion he still has it even at his age. I saw ZZ Top open for Aerosmith back in 09 and that was one hell of a show. Billy Gibbons lighting one up on stage because everybody is "going green" nowdays.
The best "bang for my buck" had to be Motley Crue and Poison this summer. Tons of pyro, and they still run around like its 1986.
Edit: I would have loved to have been around to see Aeromsith in their heyday. I bet that was freakin awesome.