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.
Another of the more noteworthy ones is Ratbat. He's a voiceless servant to Soundwave in the original series, but he was Decepticon leader for a time in the original comics. Later continuities have tried to meld both interpretations for one backstory.
DR. SMOOV has created a video made from scenes from the G1 cartoon that reinterprets Shockwave as a comically poor marksman and buffoon who was left on Cybertron because Megatron wanted him out of the way.
DR. SMOOV's Transformers videos have a lot of this. Optimus Prime is lazy, Wheeljack is an amoral Jerkass, Red Alert is crazy and The Load, Chip is the Butt Monkey, and more.
Justified, it you think about it, as Devastator is frequently portrayed as the first Combiner and a prototype.
Of Course, then you look at Menasor. Menasor was one of the most powerful combiners, taking down his counterpart Superion in their debut, and only losing when facing both Superion and Omega Supreme, his next appearance had him take down Bruticus, come Season 3, a few shots to the back took him down.
Bizarro Episode: Quite a bunch, most notably Carnage in C Minor, The Core, and the absolutely terrible B.O.T.
Broken Base: Some fans like only the G1 cartoon and ignore all other iterations of the franchise. Other fans (especially younger ones) view the show as a campyMerchandise-DrivenSaturday Morning Cartoon for small children, and dismiss it in favor of newer franchises such as the Movieverse and Animated. Most of the fanbase appears to be somewhere in-between, judging G1 and other franchises based on their actual quality rather than for Fan Dumb reasons.
Crazy Awesome: Optimus Prime borders on this at times in seasons 1 and 2.
Human scientist: It's a safe bet those doors are locked.\\
Optimus: Fortunately, I know a delicate lockpicking technique. [shoots the door]
Crosses the Line Twice: The episode "Webworld", which involves the Decepticons trying to get Galvatron to a therapist. This goes about as well as you might expect.
Galvatron: "I'll destroy everything here—everything! And THEN, I'll destroy the Autobots!"
Therapist: "Yes...tell me about the Autobots."
Galvatron: "I hate Autobots! I hate Cyclonus! And I'm not very fond of you, either!"
Ensemble Dark Horse: Just about every supporting character has his/her/its own share of fans. Notable ones include Starscream, Soundwave, the Dinobots (Grimlock especially), Ratchet, Nightbeat, Bludgeon, and Shockwave. Adaptation Distillation contributes to a lot of this.
Foe Yay: Megatron never did punish Starscream that much for his disloyalty... Until he became Galvatron, that is.
Hell Is That Noise: In "Five Faces of Darkness, Part 1," Cyclonus and Scourge intend to bring back Galvatron and they begin their search at his last known location: Unicron's floating head.
Cyclonus: There's nothing to fear. Unicron is dead. (They hear a groan) Cyclonus: Must be the wind. Scourge: There is no wind in space. Cyclonus: Quiet!
Hilarious in Hindsight: In "Hoist Goes Hollywood," Hoist and several other Autobots get to be in an action movie. Unfortunately for them, the human characters initially take precedence over their bit parts, the director seems to have little respect for the Autobots (at least early on) and there's a good deal of pyrotechnics in the movie. Sounds familiar.
The references to Brawn being a Robot Chicken in "Fire on the Mountain".
In "B.O.T." there's a junkyard operator who really looks a lot like Luigi.
Ho Yay: Rodimus Prime admits to dreaming about Optimus. His own voice actor (jokingly) claimed the character was gay.
One-Scene Wonder: Hauler's appearance in cartoon was very brief. However, his similarity to both Grapple and the Constructicons led to various theories about his origins, before the character got an official background story which depicts him as a rogue member of the Constructicons.
Offscreen Moment of Awesome: In the cartoon episode The Key To Vector Sigma, Shockwave apparently defeated Omega Supreme in battle (offscreen).
In particular, the episode "Carnage in C-Minor". Sure, it has no end of animation, technical and continuity errors, but it has a good plot (as well as a little Fridge Horror at the end) and the errors have nothing to do with the plot itself.
"A Prime Problem" is another example because the plot is completely ludicrous (everyone has the Idiot Ball) and Optimus Prime hilariously flubs Spike and Trailbreaker's names. At least neither are as bad as B.O.T.
Given one Prime is actually controlled by Megatron and none of the other Autobots can tell which of the two "is real" until The Reveal Megatron's "Prime" angrily remarks about a captive Spike, "HE'S UNIMPORTANT!" which get the Autobots to see he's "phony"—the "Real Prime" would have dropped everything for Spike it's understandable.
Unfortunate Implications: Carbombya, a fairly offensive version of Libya that caused Casey Kasem to quit the series in disgust.
The ending of "B.O.T.", the nerdy girl who built the eponymous robot, comes up with the idea of possibly building another one. At which time, her classmates, Roland and Martin, gag her mouth with duct tape and drag her away, while the Autobots just watch.
Villain Decay: Particularly prevalent with combiner teams, but also with characters representing other gimmicks, such as Triple-Changers. Devastator was unstoppable in early episodes, and in more than one episode unbeatable even by the entire Autobot team. Later, he could be broken up by a single shot from Perceptor. This effect was largely symmetrical, as Autobot combiners were also brought in to replace the formerly formidable older ones. Multiple Autobot characters have been referred to as their "last line of defence", including Omega Supreme and Metroplex.