There's a real live PBY in "South Pacific". No kidding. Even a flying scene or two, complete with flak. It's set in WWII, and one of the characters is a Catalina pilot.
My favorite is "Music Man" though. Maybe cuz I feel a little Iowan at heart, or maybe I just like to laugh at em. Lots of good tunes, very little sap. Excellent cast of characters.
Never would've even heard of these had it not been for my wife.