I don't like the shows with a bunch of performers. U2's is considered one of the best halftime shows, and the timing may be part of that--in 2002, just a few months after 9/11/2001.
NYSNC, Britney Spears, and Aerosmith is definitely my favorite. I was at the Super Bowl when Bruce performed and it wasn't very good live. I saw Bruce last year live and he was fantastic though. He was on stage for almost four hours.