My personal favorites have been:
RUSH, anywhere and anytime.
Kansas, being from Kansas and all.
Almost any live band that REALLY loves to play live. One group I saw in college was a band called Nexxus (I think) out of Canada. All percussion, mostly mallet stuff and they were really awesome.
and Tim McGraw, because I got to play golf with his drummer, and then go on stage and check out his kit before the show.