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.
Adaptation Displacement: Not everyone remembers the Disch book this was based on, but that's not too surprising. According to Wikipedia, Disney had bought the movie rights to it before it was even able to get published!
Distributed by Disney. Actually a "joint venture" between Hyperion and Wang Film Productions in Taiwan. With the backgrounds, camera work, ink & paint, and most of the animation being handled by the latter. Disney does get credit in the movie for handling the main title and the opticals. Fox also financed some of the film (in exchange for the foreign rights).
Singers from the Disney Chorus also contributed to the songs.
All There in the Manual: At one point, the Disney Wiki had given names to the junkyard cars. For example, the hearse was called "Shenandoah," the Superbird was called "Plymouth," and the blue car was called "MG." You can see their names in the page's history.
Animation Age Ghetto: This was the animated film that started the recovery from it. They hired a composer with complex instrumentation (David Newman), they included jokes that only parents would catch, the film never pandered to its audience, and it was Serious Business for the animators. Furthermore, this was the film that Pixar sprung out of, including John Lassetter and Joe Ranft. You might notice Lampy resembles a certain animation house mascot, too. It's all in the OST linear notes as well as later interviews of the people involved with the project.
Ass Pull: Radio's tube is just the right kind of tube to save Wittgenstein. No matter that this tube is extremely rare and they have to go to Alaska otherwise to get one.
Awesome Music: The entire soundtrack, from the amazing DavidNewmanscore to the well-written musical numbers. Specifically, the bass lines in some of the songs are also awesome. If you listen closely to some parts of "Worthless" and "B-Movie" (most notably) you can hear spontaneous little bass riffs that just make it THAT much better when you hear it.
There's a rather egregious one in The Brave Little Toaster Goes To Mars when the appliances meet a group of balloons who floated away from Earth. Believe it or not, the scene was in the book, and wasn't a BLAM: Toaster and Crew picked up a balloon that helped them navigate their "spacecraft" and told them some of the Mars Appliances' backstory.
The song that computers sing about the "Super Highway" in the second film.
"It's A B-Movie Show" in the first film. It has little to do with the main story, and is mostly an excuse to make horror movie references.
Critical Research Failure: In To the Rescue, when the appliances ask the old computer, Wittgenstein, about how long he's been down in the basement with no use, he spits out an overly long number of nanoseconds as if to indicate he's been down there forever. If you actually do the math, though, it comes out as a little over an hour.
To say nothing of the sound the compactor makes as it relentlessly crashes down. It's like some kind of monstrous heartbeat.
Hilarious in Hindsight: "We are on the cutting edge." Also, the song "Cutting Edge" (sung by, among other things, a Tandy-style computer) was a satire of consumerism featuring modern technology singing their own praises. But to a modern audience, it's hilarious when you consider that nearly every single one of those cutting-edge appliances is now severely obsolete. The hilarious irony only grows with each passing year.
Mr. Tandy, meet Mr. iMac!
Mrs. Phone, meet Mr. Blackberry!
There's even a fan-made YouTube video of "Cutting Edge" featuring the real-life appliances similar to those from the movie, and their comparisons with modern-day 21st century appliances we still have and use today, all together in a collage. (Check this out!)
Jerkass Woobie: Air Conditioner. Even with his initial smug attitude, it's hard not to pity him after seeing his insecurities of immobility get to him. And then we see him tear up after the Master repairs him.
Moral Event Horizon: The electromagnet crane could probably qualify as Punch Clock Villain, but when it continues its pursuit of the protagonists even after they were claimed by the Master, going so far as to nearly kill him in the process, all bets are off.
In the novel version of The Brave Little Toaster Goes to Mars, the main villain was an ancient hearing aid created by Albert Einstein, who went insane after being used by a Nazi party member, then escaped to Mars, inhabited a giant refrigerator, and amassed an army of "Populux" appliances ("Wonderluxe" in the movie), with the goal of returning to Earth and killing all the humans in revenge for planned obsolescence schemes. Seriously. And it became an animated movie as well.