"I've never felt a shred of guilt about any musical I've seen that left me feeling joyous and/or moved. If I had a wonderful time at a show that is flocked to by the unwashed masses or was a colossal flop and critically eviscerated, then that's just the way it plays out."
This.
That being said, if you want some specifics:
Love Never Dies
Shrek
Sister Act
Anything Frank Wildhorn wrote ever.
Elisabeth
Mozart!
Tanz der Vampire
Rebecca
Notre Dame de Paris
Martin Guerre
Butters, go buy World of Warcraft, install it on your computer, and join the online sensation before we all murder you.
--Cartman: South Park
ATTENTION FANS: I will be played by James Barbour in the upcoming musical, "BroadwayWorld: The Musical."