I've always loved Tales of Symphonia, despite all of it's incredibly annoying flaws.
Like for instance, the game let's you play co-op with other players, or set other party members to AI. Of course, the camera was alway focused on the first player, and their target monster, and had an irritating habit of switching to the closest enemy, and have your friends yell at you. And to remedy this problem you can always play alone, of course the game slaps you in the face with this too, by having your teammate AI be Pants-on-head-retarded. For instance, as soon as your healer runs out of TP they'll run up to the enemy/boss/whatever, and trying to beat it to death instead of waiting for you to restore it. If you're fresh out of potions (or "gels" in this game), your tempted to let them die, but you soon get the impression that the game hates you, because after each battle you are assigned "Grade" based on how well/poor you did in battle, and it pisses you off to lose 8 grade or so because your teammates are too retarded to run away when they're dying, as well as the arbitrary item cost.
Also the dungeons suck, and the game seems to find a way to throw five or six "Final" dungeons at you.
To the games credit, when you're not being irked by the above issues, the battles are tremendously fun, especially boss battles.
That was a big ol' edit eh?