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.
Film Brain. He's either hilarious and adorable or just annoying. There don't seem to be any middling opinions.
Santa Christ. He's either way cool and a fitting part of the special or a God-Mode Sue who should never have even existed. Whatever you thought of him before, Kickassia won't change your mind.
Better on DVD: The whole thing is meant to be watched all in one go as a 90-minute film. The original idea was to release it in three parts, but it was later changed to six (see Trilogy Creep). That said, Doug himself has advised that's it's best to either watch the whole thing from start to finish or, failing that, watch parts one and two together, parts three and four together and parts five and six together.
Continuity Lockout: The movie is almost completely unwatchable unless you already have a decent grounding in the memes and recurring jokes and characters on the site. Even fans of the site found the ratio of "callback jokes" to "actual jokes" a bit off. Doug learned his lesson from this, and the next year's special Suburban Knights is far less dependent on knowing everyone's schtick.
Crosses the Line Twice: Santa Christ's cameo. They manage to get out two words of his theme song, before it's interrupted by N. Bison shooting him dead.
The timing on the music in Part 4 when Ma-Ti yells at The Nostalgia Critic as he exits is perfect!
In Part 5, the Boss Theme from the SNES Batman Returns game becomes a Crowning Music of Funny.
Dude, Not Funny!: Some German fans took issue with the Godwin's Law gag in Part 1. They acknowledged that it wasn't as bad as it could have been (the joke is clearly not about the Nazis themselves, but the Critic's nonsensical use of them as both positive and negative reinforcement and everyone else eagerly going along with it), but still thought it too much in bad taste to be funny.
It would seem they're more upset that the Nazis are brought up because it's one of the low points in Germany's history, rather than anything else, since some of the Jewish posters on the That Guy with the Glasses.com message boards have pointed out that they took no offence to it, and they had more right to be offended by the joke than the Germans. And that's forgetting that at least one of the people actually on screen in that scene is Jewish.
Not just onscreen, but, in a deleted scene, had specific attention drawn to him for a few seconds (hiding a Star of David necklace).
The Critic being happy not to do any reviews ever again becomes slightly less funny later on when he has a Heroic BSOD about how pathetic reviewing makes him.
Critic telling the Chick it'll fall on her to keep the nostalgia name alive becomes the opposite of funny after To Boldly Flee.
Doug's commentary beating himself up for the other producers getting sunburned (despite he and Rob telling them to wear sunscreen) is cute, but after nearly stopping Suburban Knights because he was so scared that everyone hated him, and refusing to eat/sleep in To Boldly Flee so he wouldn't snap at anyone, it really should have sent off warning bells.
Harsher in Hindsight: The “sometimes we all need to give into the madness” scene. Everyone knows about Noah's eventual meltdown, but Doug can and has turned into quite the hot mess himself.
Ho Yay: 8-Bit Mickey riding Handsome Tom while shirtless.
Lee's interview with Chris Larios: "You feel beautiful."Well, he is 3-D now.
In one of the bloopers, Benzaie kisses Spoony on the cheek when trying to get him to turn into Dr. Insano.
Idiot Plot: The main source of humor is derived from the fact that pretty much nobody (exceptions being maybe Phelous and The Snob) acts like they have anything resembling common sense.
Jerkass Woobie: Critic, the Jerkass bit more pronounced than normal. The banishment of Cinema Snob gets followed by the sympathy-inducing Big Lipped Alligator Moment of Ma-Ti warning him in Part Four. In Part Five, after being as upset as everyone else with the accidental shooting of Santa Christ, he decides to throw the dead body in the dumpster. And in Part Six, the whole episode is him getting his comeuppance.
Magnificent Bastard: Fritz von Baugh in part 3. He goes around convincing everyone that they could be better presidents than the Nostalgia Critic as well as making the military distrustful of their leader by planting evidence of possible evil on the Critic's part. Lampshaded by the Cinema Snob.
Moral Event Horizon: The Critic's killing of Santa Christ is seen as this by the team, even though he didn't mean to and went to great lengths to try and bring him back. Even Film Brain turns on the Critic after the fact.
Nightmare Fuel: Spoony transforming into Doctor Insano. This picture from the credits illustrating the scene helps add to the creepiness factor.
The Critic revealing what he needed that dynamite for along with his use of the term "Nasty-wasties."
Rescued from the Scrappy Heap: Both Film Brain and Phelous were immensely hated at early points of their review careers. In Kickassia, they are given plenty of screen time and funny moments to encourage people to give them a second chance. Both succeeded.
Rewatch Bonus: After the Critic/CR crossover where the former admitted to being disgustingly self-loathing and insecure, a lot of Critic's behavior here suddenly makes sense. It also has the bonus of adding depth to the Looney Tunes-esque flick, even if it's only with his scenes.
Spiritual Licensee: As admitted by the cast and crew, Kickassia is basically a fully live-action Looney Tunes skit. The initial encounter between Nostalgia Critic and Baugh are even a direct remake of Wile E. Coyote's introduction in his encounters with Bugs Bunny.
Doctor Smith, whose idea of a legion of spiiiders is hated by everyone (except JewWario).
Spoony. Seeing him tense up over the fear of unleashing Insano, how could you not want to give him a hug and tell him it's going to be okay?
Arguably Film Brain. His character was basically a huge Nostalgia Critic fanboy, yet the Critic himself always seemed disinterested in him. Due to his strong dedication to the Critic, the rest of the cast also disliked him because he refused to help overthrow the Critic until the Critic killed perhaps the one person he idolized more: Santa Christ. Sure, he was a Yes-Man, but he was such a fan of the Critic, he didn't realize he was being such a brown-noser.