Broken Base: Half of the fandom hates this game with a burning passion seeing it as an Obvious Beta to get used to the DS technology; the other half... well, it doesn't love it, but find it at least okay. Positives listed are usually the characters, both in terms of personality and design, while the negatives centre around the limited gameplay and rushed story.
Complete Monster: Rommy is an Inquisitor for the Church of Janna, a Fantastic Racist organization that labels all Leimorneans as heretics and wants them wants them captured for magical experiments that harvest their souls. Not only is she a gleeful participant in this organization, she's a cruel sociopath who kills people for fun then blames it on her prisoners (usually innocent people who happen to be Leimorneans), tortures and brainwashes said prisoners, and sics Caius's brainwashed dad on him for fun and then kills the guy (in front of his son) after she gets bored of their fight. We see her kill the main heroine's parents for no reason as her Establishing Character Moment and it's implied that she has a lot more victims than the ones we see. She also messes with Rubia's perception of her friends via Hannibal Lecture, again, because she thought it was amusing to watch her resulting Heroic BSOD. Everything she does is For the Evulz and she is utterly unrepentant about her crimes. While she may be possessed by a Spot, it is implied that the Spot IS her, and Spots are shown to have a sense of morality (if an unusual one).
Arria is also very popular, for a less important party member, mainly due to herdesign.
Misblamed: Some people tend to think Namco developed the messed up game. It was actually Dimps.
They Changed It, Now It Sucks: Many mechanics are strangely different from other Tales games (absence of world maps, small party, short playing time, etc), and of course that leads to flame. The whole "having to use Tent to see skits" thing was particularly hated.
They Wasted a Perfectly Good Character: Prince Tilkis went off alone to protect his country in a rowboat, and only took Forest with him because he insisted on going. Not only do we never get to see Senishibia, but Tilkis is probably the least important main character to the plot and only plays minor roles in other people's storylines, never getting one of his own.
Viewer Gender Confusion: It can be hard to figure out that stunner with a long ponytail, big shoujo eyes, and what appears to be a skirt is Prince Tilkis without any context.
The Woobie: Caius. He goes through a big Trauma Conga Line in the beginning of the game through no real fault of his own, and it just gets worse from there. His reaction to his foster father's death over the course of the game is actually pretty well written - not too whiny, but not too apathetic -, and that just make it seem sadder. Then, when he finds his long lost brother, they're enemies and he has to kill him. Lukius survives and Heel Face Turns, so it's okay, but it's still sad.