I played La Mancha 25 years ago for a university production, and while I don't remember much of the music I do remember much of the fun. Jesus Christ Superstar (the London version, not the ultra-square N.Y. version) and West Side Story are both awesome books I've been fortunate to play. I would love to do either (or both) of them again! I find it interesting that when one views The Rocky Horror Show (NOT the Picture show) in the context of Broadway musicals, it's not any more silly or outlandish than, say, Oklahoma!
And Bat Out of Hell has one of my favorite bass players, Kasim Sultan. The guy is fun to listen to, and I love that they kept the flubbed note in 2 out of 3 Ain't Bad.
Lots of excellent music listed in this thread, guys!
John