Since Bon Jovi is my favorite band, I'm going to say all their shows have ROCKED.
Also, Motley Crue - never saw a bad show. Metallica, another band that is just awesome live. Guns n Roses, must have caught them on a good night b/c I have heard some bad things about their shows, but I thought they were great. So many of those 80's bands that I could list as great rock concerts - Queensryche, Slaughter, Extreme, etc.
Meatloaf - another great concert, he was really amazing, so much energy.
Other great concerts that I don't consider "rock", but I loved were Billy Joel, Elton John and Duran Duran.
I also saw a couple of country acts that really surprised me. I guess b/c I am not really into country music I didn't think I would enjoy them, but I did. They were Travis Tritt, Brooks & Dunn and Toby Keith.
ETA (because I didn't read the responses until after I posted) - so happy to see so many Bon Jovi fans
