- Awesome Ego: Benny spends most of his verses bragging about how awesome he is, but they're certainly entertaining to listen to.
- Ear Worm: Anything that Lin-Manuel Miranda raps.
- "I'll be downtowwwwwn!"
- "When I was a child I stayed wide awake, climbed to the highest place on every fire escape!"
- "Alza la bandera, la bandera Dominicana! Alza la bandera, la bandera Puertoriquena! Alza la bandera, la bandera Mejicana! Alza la bandera, la bandera Cubana!"
- "Parriba esa bandera! HEY! Alzala donde quiera! HEY! Recuerdo de mi tierra! HEY!"
- "Honk your horn if ya want it!" (Pit horns and car horns: BA-BA-BAH!!)
- "Anything at all can happen just before the sunrise..."
- The irresistible urge to snap your fingers along with "When The Sun Goes Down", which many a rude audience member did when the show was playing.
- "No pare, SIGUE SIGUE!" (Wooooooooooooah, wooooooooooooah)
- "The hydrants are open, cool breezes blow."
- "Funny Aneurysm" Moment: Benny rapping about how if he won the lottery he'd go to business school, become successful and start golfing with Donald Trump as his caddy becomes harsh considering the amount of racism that Trump has allowed to bloom during his 2015-16 presidential campaign. note Though it also doubles as a Moment of Awesome in hindsight, that Benny wants to become richer than Trump and bring him down a peg. In any case, stagings in The New '10s, and the subsequent movie adaptation, replace his name with that of professional golfer Tiger Woods.
- Glurge: The most common complaint about the non-musical dialogue and general plot.
- Heartwarming in Hindsight:
- Chris Jackson and Lin-Manuel Miranda starring in this musical becomes this when considering their impact as the leading actors in Hamilton.
- Lin's character Usnavi has a crush on a character named Vanessa. By the end of the decade, Lin married his long-time crush Vanessa Nadal.
- For the original Broadway production, Daphne Rubin-Vega recorded a DJ spiel to play on Graffiti Pete's boombox at the start. For the movie, she landed one of the major roles, Daniela.
- 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. The Kennedy Center's 2018 production added another level, when lead HSM actress Vanessa Hudgens landed the role of Vanessa — opposite Anthony Ramos as Usnavi, who'd later star in the In the Heights movie.
- The video also featured Jonathan Groff, who was playing Melchior in Spring Awakening - the production of which was on Broadway when In the Heights opened. Cut to 2015, and Groff was in Miranda's next Broadway outing/smash hit at the same time as the revival of Spring Awakening.
- A character played by Lin-Manuel Miranda (in a musical he wrote) telling us in the opening song about how we've "prob'ly never heard [his] name." What's your name, man?
- Minority Show Ghetto: Sadly why the movie adaptation spent years in Development Hell.
- Moe: Both Sonny and Carla are adorable. Sonny's a bright, optimistic kid who's never taken seriously by the cast but remains the Only Sane Man. Carla's a ditzy airhead who fails to catch on to the cast's sex jokes and has an Adorkable moment trying to come up with something to sing at the carnival.
- Nightmare Fuel: "Blackout." The whole neighborhood goes dark (in the middle of a heatwave, no less!) and immediately, there are robbers in the street. Adult Fear runs rampant as the cast try to find each other (Particularly Benny, Nina, Usnavi, and Vanessa, who spend the first half of the song crying out to each other in vain); Usnavi hurries to Abuela Claudia, who is at home by herself; and Sonny and Graffiti Pete are left to protect the bodega alone with only a baseball bat and some fireworks.
- Signature Song: "96,000" is one hell of a showstopper that contains some of the most hardcore, take-no-prisoners rapping in Lin's career, and tends to get a lot of airplay on showtune radio stations. "Blackout" is also an amazing Crowd Song that packs in a ton of vocal talent.
- Values Resonance: With the increased political unrest in America in the late 2010s, and sheer number of young people becoming political activists — many of the most prominent voices not even being done with high school yet! — the teenage Sonny's political ambitious and determined idealism seem even more relevant than ever.
YMMV / In the Heights