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.
YMMV: Pitch Perfect
Actor Shipping: In addition to Beca and Chloe, Anna and Brittany are also shipped together. It doesn't help that they tend to flirt with each other during interviews.
She sees losing the finals the previous year as her fault. In order to redeem herself and the Bellas they need to win, right? So she insists that they continue to do the previous year's show and choreography because that's what got them to the finals last time.
Jesse, Dogged Nice Guy or a dude who fails to grasp the concept of boundaries, insinuating himself into situations that don't require his input and only ends up with Beca in the end because he's the Designated Hero?
Beca, cool, sassy rebel or rude, whiny, and self-centered?
Black Sheep Hit: "Cups" turned out to be an insanely popular song months after the movie was released due to people posting videos themselves copying the scene. It became so popular that a longer version was produced and sent to radio, and despite being barely over 2 minutes long, it's turned into a big hit.
Crosses the Line Twice: Lilly getting knocked over into Aubry's puke puddle? Gross, sad, but strangely amusing. Lilly suddenly moving her arms and legs in it like she's making a snow angel? Disturbing yet hilarious.
Crowning Music of Awesome: The Riff-Off, as well as the Trebles and Bellas finals. "Cups also ended up being this as well, see above.
Special note goes to "Cups" (a cover of "You're Gonna Miss Me when I'm Gone" by Lulu and the Lampshades accompanied by percussion beats from a Solo cup). It's pretty much impossible to go on YouTube without tripping over a new cover these days. Even Anna Kendrickended up making fun of it.
Hollywood Pudgy: Entirely Averted. Cynthia Rose and a couple of the other minor Bellas are played by actresses who are average sized women that might well get tagged with this trope in other movies. Nothing about their size is ever mentioned here.
Actually, the first time the new Bellas line up sings in a competition, John and Gail make a snide comment about the line up being more "diverse" this year, in comparison to the last year's team who were all about the same size.
With Fat Amy who is played by a legitimately big woman, it's only ever Fat Amy who talks about her size and even in that she is very firmly of the opinion that her weight/size is positive thing.
Nausea Fuel: Lilly making a...puke angel in Aubrey's vomit.
Romantic Plot Tumor / Token Romance: While not taking up an excessive amount of screen time, Beca and Jesse's romantic subplot adds little to the film and seems somewhat obligatory. Beca's growing to accept that she likes being a Bella could easily have been character growth enough.
Ron the Death Eater: Much more canon than simple Alternate Character Interpretation is Jesse being a self-righteous prick who, self-righteously, believes he has some right to barge into Beca's personal life, despite the fact she prefers to be closed off to everyone, and that he has some sort of Chosen One divine duty to drag her out of herself and get all involved when she doesn't really know him and it's none of his business. He only gets her because he's the Designated Hero.
Also, you know, a great excuse for Beca ditching him in favour of Chloe.
It's almost as if that behaviour was put in there to detract from his 'nice-guy' status, because calling her dad was the responsible thing to do (though if he knew her at al well, it might've been nicer and more sympathetic to just get her out and hope her dad never finds out), so the fans wouldn't feel quite so bad shipping Beca and Chloe...