I think I'm on the flipside of this one.
I love musical theater. I was an actor through all of junior high and high school, and performed in several musicals over that period including Carnival, Guys and Dolls, and West Side Story. My dad was also in drama and raised us listening to the soundtracks for The Fantastics, King and I, South Pacific, and dozens of others (right alongside Willie Nelson and Kris Kristofferson albums). I was also in band from 6th-12th grade playing French horn on hundreds of symphonic pieces, including many scores for musical theater pieces.
So I have a great appreciation for musical theater, and own the scores and soundtracks to a couple dozen, my favorites of which are probably Phantom of the Opera, Evita, Miss Saigon, and Les Miserables (each of which I've seen in person several times).
But for me, Hamilton was just okay. The story was clever but the music wasn't all that great. Just my opinion of course, but it's certainly not something I would go out and buy to listen to over and over again, nor do I feel the need to see the production a second time. Still, I'm happy that this particular art piece appears to have moved so many people, especially those who aren't ordinarily into musicals. Perhaps some of those folks will find their way to other musicals and learn to enjoy the entire genre. Wouldn't that be something?