I'm pretty ticked at the first few comments on this thread about Phantom but that's probably just me being a hardcore Phan.
I have seen 16 Broadway shows and the only one I didn't enjoy was Shrek. Choosing favorites is hard. Wait. Make that 14, two of them were plays.
The Little Mermaid
I have seen Phantom twice so I feel it appropriate to mention it twice on the list. I loved the other musicals (besides Shrek) but these are the ones I enjoyed most.
I saw two plays. War Horse and Peter and the Starcatcher. My favorite has to be PATSC. It was hilarious!
"Starbucks? What's Starbucks?"
"I will kill you until you are dead!"
"Right, and I bet your milkshake brings all boys to the yard?"