This one came to mind instantly, no questions asked.
I love this musical. LOVE IT. The music...you guys, THE MUSIC. I've played in the pit for it twice now, and I love getting to shwank out some slinky clarinet action for the bottle dance at the wedding...but seriously, I love all of it.
I love Tevye's devotion, and yet his willingness to change and improve, his love for his daughters, the unity of their traditions and how important religious traditions really are. I love the messages, the lyrics, the characters, and yes, the Fiddler.