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 Headmasters
Badass Decay: Everybody, including citybots and massive combiners (eg: Predaking) are suddenly almost impotent, and only the exalted Headmasters can save the day.
Crazy Awesome: Sixshot is a ninja who has six different transformations ( and later turns out to actually have seven) and is the unstoppable badass of the Decepticons. He fights giant rock monsters singlehandedly and can make holographic copies of himself amongst other insane abilities. He solves the problem of being blocked by Pounce and Wingspan by karate-chopping their heads off.
God-Mode Sue: The series pretty much only exists to tell everyone how wonderful Fortress/Fortress Maximus and the Headmasters are. Even the simplest of tasks requires the titular characters to save the day.
Even funnier, the only interaction that Chromedome has with Rewind (who is his lover in MTMTE) in this series is a scene where Chromedome insults Rewind as a coward for not wanting to fight. In MTMTE we learn that fighting is the exact opposite of what Chromedome wants Rewind to do and the two get into a bad fight when Rewind actually does take part in battles.
Memetic Mutation: "Darn that Soundwave. EYUUUUUUAAAAAAAAAGH" This has become so popular amongst Transfans that when a common joke among Transfans is to yell "Darn that x, EYUUUUAAAGGH" whenever any character dies.
"Billy, are you okay?" "Not really... find the Power Pack!" (For context, "Billy" is Blaster and the "Power Pack" is the Matrix. These are his last words before he dies and is rebuilt as Twincast.)
"What's wrong with with the Headmasters? Couldn't they fight without Chromedome? Fortress Maximus has come himeself. Okay, then I shall get Fortress Maximus to fight me!!"
Most Annoying Sound: The fight music consists mainly of a few repetitive beats that, by the twentith time you hear it, will make your ears burn.
Narm: In one episode an animation foul up results in the image of noted pacifist First Aid roundhouse kicking Tracks in the face (it should be noted that Tracks is a fellow Autobot). The Tfwiki had a field day with it:
The infamous first English dub is almost nothing but narm.
"You're such a coward Wally!"
Never Live It Down: No matter how good the original series was, it will never escape the image of the Narm-tastic english dub.
Pacing Problems: The shows biggest problem. Despite having a clear end goal, the story meanders as not much is achieved in many scenes. Entire episodes do nothing to advance or introduce the chracters and it comes off as extremly dull much of the time. Even the fight scenes are often slow and badly paced. On the flip side, the two part ending has the final battle start halfway through the second episode, making it seem extremly rushed.
The Scrappy: Wheelie, although he doesn't talk in rhyme here and his voice is arguably less annoying, he can still be irritating and his prominence throughout the series doesn't help.