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: Suikoden III
Alas, Poor Scrappy: Lulu may have been annoying, but his death at the hands of Chris was one of the saddest moments in the game, especially when you consider he was best friends with the main character and now his mother was childless.
Fridge Brilliance: So what were those apocalyptic visions that were so bad that they drove Luc to Jumping Off the Slippery Slope? Let's take a more in-depth look... It was a colorless, stagnant world dominated by order and full of spherical monsters. While The End of the World as We Know It is bad enough and could possibly push anyone to try to avert it, when you remember Luc has a pretty intimate connection to somebody who has a True Rune that represents Order and has a circle motif, and that this person just might be the one person Luc hates more than Sasarai, his rather drastic actions to avert such a future make a LOT more sense. Still confused? Luc saw what might actually happen were Hikusaak to succeed in gathering all 27 True Runes, and if one of those True Runes were destroyed, this future becomes impossible to achieve.
You can level up Chris, Borus, Salome, and Roland to level 99 in Chapter 1. It just involves a ton of time and tediousness and the rewards, while good since there are a few stars that will be level 99 if you recruit them, isn't really worth it in the end.
The above is of the Disc One Nuke variety of this trope. However, some surprising characters are effectively game breakers if you abuse abilities, titles, equipment etc. Quite possibly the best person in terms of pure destructive terror is a completely optional 15 year old girl. Who needs a True Rune anyway?
Juan and Emily. The battle system allows characters with the right skills to attack several times per turn, and they can move on to other enemies when their enemy falls before their attack string is finished. These two can get more than 10 attacks per round each, with each hit doing roughly 400 damage. Add to that the fact that Juan has a Waking rune attached permanently, which means he's doing at least double damage when he wakes up. The downside is that this means he's going to be sleeping for at least the first round, but you can equip accessories that nullify sleep to just have them demolish absolutely everything you encounter within one round. Even bosses don't last very long against that.
Ho Yay: Caesar quite a bit with Hugo in the manga.
Nicholas with Duke's father.
Iron Woobie: One bad thing after another for Thomas, but does he complain?
Les Yay: There's a bath scene between just Ayame and Chris, in which Chris basically just stares at her for the entire duration of it.
Magnificent Bastard: Albert Silverberg constructs the entire plot of the game single-handedly and then casually derails it, confident that he's proven his genius and increased his reputation as a strategist. Then there's the fact that he never once believed that Luc's plan would work, but only went along with it to show off his capabilities.
Albert: "This whole thing is getting too melodramatic for my taste."
Salome has shown himself to be quite magnificent if he sets himself out to do it. Even more so in the manga adaptation, where he orchestrates a coup against the Zexen Council all while making it look like he was obeying their orders, and tricks the traitorous members into incriminating themselves as Harmonian spies with nothing but a few rumors and a forged letter.
Guillaume, a French, overweight, cheating, dog-kicking, lying paedophile, is most likely an intentional example of this. (And the player gets to enjoy whupping his portly posterior several times.)
And Kenji. Bodybuilding teacher who jogs in a fight and fights with calisthenics... WTF?
From his stupid name, to his status as a Millstone and a Tagalong Kid, to the shit-eating grin in his character portrait, nothing Lulu said or did failed to get on This Troper's nerves. Also, with his small size and his habit of picking fights with opponents far more powerful than him, he actually bears an uncanny resemblance to the original Scrappy. At least his death gave catharsis to players who had also watched Scooby-Doo and wished such a thing would happen to the original.