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.
Anything with Bruno and Jacop after their Heel-Face Turn, particularly when Jacop tries on Harry's glasses.
In Episode 22, a disguised Harry confronts Loran about his disguise as Laura. When Loran replies that it isn't exactly a disguise, Harry mistakes the reply that Loran means that he likes cross-dressing...
Fran also takes the piss out of the dramatic entrance of the Turn-X by noting that a turned X is still an X.
In the last episode Lily Borjarno finally gets fed up with Guin calling Loran "Laura", and suggests he put on a skirt and chase after Loran. Guin notes that society hasn't progressed to the point where someone wearing a skirt can rule the world. Mere minutes later, he is forced to flee into exile and Lily declares that she will take over control of America Ameria in her skirt.
Darkness-Induced Audience Apathy: It's easy to feel that the Black History kills every happy ending or advance humans make. Humans make contact with aliens? We have absolutely no explanation for what happened but The Black History means something went terribly wrong. Descendants of your favorite characters? Probably dead. The end of the season and peace at last? Meaningless because of The Black History. And a lot more.
Freud Was Right: Corin Nander's unitard has a very suggestively-designed arrow-and-circle 'male' symbol on the crotch.
Fridge Horror: Minor villain Teteth Helleh gets some humanization just before she dies. 30 episodes later, we see the reason for her humanization (her mother) come out of Hibernation looking for her. Two characters nearby comment that they've heard the name she's calling out for before.
The Reveal about the Black History means that the struggles in every other Gundam series you've watched ended with the Moonlight Butterfly centuries later. It's worse if the series had an idealistic ending, because it means that all their struggles and hope for the future just ended with humanity falling back into devastating wars.
God-Mode Sue: Arguably the Turn A. Arguably because while powerful it still comes across as if a good zerg rush or death of a thousand cuts could do it in. It also helps that its ultimate opponent, the Turn X, is just as powerful.
It Was His Sled: The Reveal that the Black History refers to the events of previous Gundam series was a major plot twist; nowadays, just try to discuss Turn A without it coming up at some point.
Narm Charm: Harry's red, insect-eye-like shades, along with everything he chooses to wear when not in uniform.
Tear Jerker: The absolutely beautiful ending in the final episode on its own, and especially if you've seen the entire series. Here it is for those of you willing to see it. Spoilers abound...it IS the ending.
The funeral of Dylan Heim in episode three. Sochie and the two house servants are absolutely overcome with grief, as is Loran over the death of a nice man who really did nothing to deserve it. To make matters worse, he is one of so many casualties that they have to rush to bury him right away, even before contacting his wife and daughter.
They Changed It, Now It Sucks: The design of the Turn A Gundam, by American Syd Mead was very different from the standard Gundam look, and a lot of fans didn't like it; even Tomino himself has mentioned he wished he'd been more involved in reviewing Mead's designs.
The Scrappy: For those whose only exposure to this series was through the "Dynasty Warriors Gundam" series, Loran. While all the characters in that were flanderized to hell and back, removing subtle nuances and non-annoying aspects, Loran got hit with this unbelievably hard. Constantly whining about how bad fighting is- in a fighting game- coupled with an annoying voice and calling out how bad all the other characters are for piloting mobile suits while piloting one himself did little to endear him to players.
Vindicated by History: While the series wasn't very successful with its initial ratings, it's over time grown in popularity and is these days seen as one of Tomino's best Gundam works.
Wangst: Poe Eiji whose constant whining over even the slightest thing starts to get grating even to some characters in universe after a time. There is even an episode titled "Crybaby Poe" hanging a lampshade at this.
What Could Have Been: At one point in the draft of the ending, Dianna was supposed to be showing obvious signs of age. (She ends up using a walking stick, maybe, and sounds a little older in the final version.)