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.
Fridge Horror: A probably intentional example: in the earlier parts of the series Fatman is a source of humor, with his grunting way of speech and his singlemindedness. Then we find out that he used to be a slave, and those two traits are undoubtedly because of his horrible upbringing.
Moral Event Horizon: Kashim King's is either brainwashing Elchi, complete with Brain Uploading a copy of himself or firing on the noncombatant Innocent Jiron let escape in the final episode.
Ugly Cute: Jiron is famously not a typical Real Robot lead - specifically, he's not terribly attractive, frequently getting called Do-Manju ("uber-beancake") or, in one well-known case, Melon Amos. And yet he doesn't have too much trouble attracting the ladies, more through his personality and actions than anything.
Woolseyism: In the fansubs and translation of Alpha Gaiden, Timp's overly personal and casual speech is changed to make him sound like a Cowboy. Specifically his frequent use of refering to people with sarcastic Japanese sibling terminology is changed to "Pardner" and "Missy".