These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Glurge: The most common complaint about the non-musical dialogue and general plot.
Hilarious in Hindsight: One of Lin-Manuel's early Youtube videos was him rapping about the show (before it officially debuted on Broadway) in a parody of "Bet on It" from High School Musical. He even directly calls out Kenny Ortega and the movies themselves. Cut to two years later, when who is cast but Corbin Bleu of HSM fame, in the role of Usnavi no less.
Especially Usnavi's speech at the start of the song. "They said a combination of the stress and the heat, why she never took her medicine, I'll never understand. I like to think she went out in peace, with pieces of bread crumbs in her hand."
And the song that follows — "Everything I Know".
"Inutil". It's a bit harder to understand if your one or both of your parents isn't like Kevin...from a different country...working their ass off...just so their kid can have a good future....'scuse me.
Believe it or not, the end of "Carnaval de Barrio". It's a very happy, celebratory song...but it ends with the Piraguero and Daniela singing "Esa bonita bandera! Contiene mi alma entera!" ("This beautiful flag, it holds the whole of my soul"). It may not seem like much, but in a country that's currently having a lot of problems with immigration and racism, a stage full of characters taking pride in their heritage moves this child-of-immigrants troper to tears.
And "Paciencia y Fe"
The finale for sure, especially beginning the moment Sonny and Graffiti Pete lower the grate.