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: Vandal Hearts
Complete Monster: Kelbrun Hale in Flames of Judgment, who spends his first scene bludgeoning a defenseless young woman to death with a sledgehammer, then laughing about it.
Vandal Hearts II. If you bought the second game after playing through the first expecting more of the same (at least semi-)realistic looking characters, nasty-looking animated monsters, and floating backgrounds, as well as gore, character classes, intriguing narration and CGI cutscenes, you're definitely going to be disappointed to find that all the characters in the second game are now animeish, with tiny bodies, over-sized heads and no mouths, the first monsters you encounter are now just cartoonish snakes, no cut scenes, and character classes are now based on equipment along with enemies that can dodge attacks, making battles long, difficult and frustrating.
The jury's still out on Flames of Judgment.
Game Breaker: The secret Vandalier class from the first game. It has all spells in the entire game, enemy spells included, the highest attack and defence values, no natural weakness, and it blocks all attacks from the front and most attacks from the sides.
Dolf. There is hardly a single character in the entire game that wouldn't have been better off without his meddling schemes.
Zohar Abu Sa'id. He managed to escape the time warp pocket dimension and lay his wayward (read: psychotic power hungry) former apprentice to rest. With really cool magic.
Nightmare Fuel: Vandal Hearts, 2nd chapter, 1st mission. The pre-battle sequence is completely creepy, seeing green-skinned humans, moving like crazed zombies, with creepy music, and creepy sound effects to advance the dialogue. Not to mention the creepy sound the Evil Statues produce! Brrrr....!
The Scrappy: Two character classes from the first Vandal Hearts are particularly unpopular with most players.
The armour classes have huge attack and defence, but their terrible movement means they'll never keep up with your sword wielders and flyers. Plus, they're incredibly weak to magic which becomes increasingly prevalent as the game continues.
And the monk classes, which for the enemies mean a durable and annoying foe with no exploitable weaknesses. For you it means taking one of your few spellcasters, giving them mediocre stats all round in a game based on specific class roles and a poor selection of spells.
That One Boss: From the first game, Kane as the Black Knight in the final chapter, 1st mission with his Plasma Wave, which deals heavy magical damage to EVERYONE IN YOUR PARTY. And he stands next to an MP recovering panel, and there's still some imperial troops guarding him. Although if Ash becomes a Vandalier before this battle, you can return the favor with your own Plasma Wave. In fact, if you are really patient and don't smash through the barrier, you can actually slowly kill Kane with multiple Plasma Waves and, with the barrier intact, he never turns into the Black Knight. The ending of the battle is still the same.