Pantera. I don't know that I'd want to see them now, but I would have loved to have seen them when I was a teenager, or maybe my early 20s. Of all the really heavy bands I liked back then, Pantera was the only one I never saw live.
Also, the usual suspects: Hendrix and The Who in particular.
Originally Posted by why
Yes. I keep hoping they'll actually do a reunion tour so I can see them. They are probably the top band on my "I was alive and a fan when they were touring, but I still managed to miss them and it kills me" list.
I did see Tom Morello when he did the first Nightwatchman tour, and I got to meet him during a meet-and-greet. That was pretty cool.