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: Transformers: The Movie
Adaptation Displacement: After the cancellation of the cartoon series, the Movie, which was widely available on home video, became most people's introduction to the Transformers universe.note At least in the U.S. Outside the States, it's the other way around.
Awesome Art: Probably the best aspect of the whole movie. The animation is very fluid, with some great dynamic camera angles and exciting action sequences, and the backgrounds are utterly gorgeous paintings. When you consider that the scenery and characters consist primarily of complicated, hard-to-animate machinery, it's even more impressive!
Awesome Music: Every piece of music in the movie is either loaded with synthesizers, or an epic hair metal tune. Everything awesome about The Eighties in one soundtrack!
Special mention to Stan Bush's tracks, "Dare" and "The Touch".
Big Lipped Alligator Moment: The Junkions' dance with the Autobots on a Junk planet, to the tune of "Weird Al" Yankovic's 'Dare to Be Stupid' is probably a borderline case of this. The only thing keeping it from being such is Ultra Magnus being rebuilt during the scene, though as that comes after Wreck-Gar settles everyone down from the dancing number...
A random Junkion kissing Grimlock during the dancing number.
Growing the Beard: Though still So Bad, It's Good, this film and the Marvel comics that were running at the time were the point where Transformers fiction started becoming more than just a glorified toy commercial and developed actual plot. Fitting, considering the fact that this film indirectly establishes a lot of the mythos for the franchise that later incarnations would build off of.
Hilarious in Hindsight: This movie is often foremost in the minds of people who said Michael Bay was raping their childhoods by including a prominent human character and a goofy robot buddy. Of course, if you actually watch the movie, there Daniel and Wheelie are...
It Was His Sled: Hot Rod becomes Rodimus Prime. Optimus Prime (and several other Autobots) dies. Megatron gets reformatted into Galvatron. The giant planet Unicron has a robot mode!
Narm: The opening scene with Unicron devouring an entire planet is chilling, but when we see a masher within Unicron making cartoony chomping noises, it loses some of its punch.
Never Live It Down: Ultra Magnus' "I can't deal with that now!" in response to seeing Hot Rod and Kup get shot down has become popular in the fandom to make him look like an incompetent fool/ massive Jerk Ass.
The Scrappy: Wheelie (because he speaks in rhymes) and Hot Rod (his actions - unintentionally - got Optimus killed).
Transformers The Movie was the first Western animated feature film to rely on ideas from anime and comics (and yeah, Star Wars) to set up an elaborate space opera with a backstory and continuity tie-ins to resulting episodes of the series. After it came out, all the other Saturday Morning TV series copied the idea. With the rise in popularity of anime and elaborately plotted multiverse continuities in every franchise (Transformers or otherwise), it's considered no big deal now.