Hexyz Force - Ignus. He doesn't even get the same type of weapon as everyone else for a little bit, meaning you need to constantly use perishable items with him. And then when you finally do get a standard weapon it's not his "special one" and he can't use what is essentially this game's version of a limit break. Come on now.

Trails of Cold Steel - Jusis or Rean. Neither are bad but they're just kind of repetitive. Most others are unique in some way but there are 3 sword users and Laura packs a bigger punch. So these two just fill the same shoes so there's never really a need for both in your party. Emma to a smaller extent because what she can do, Eliot can do better.

Like WK said, many of the Suikoden characters get pretty repetitive, so basically just pick your favourites out of x group.

Persona 4 - Naoto. Just too late for me to really care or want to invest anymore.

Dark Cloud 2 - Monster transformations. It takes an insane amount of time and effort to get them somewhat useful, but everyone else is just better anyway. It is cool talking to monsters though

Dark Cloud - Gorooooooooooo is the slowest being in the universe. Sure he hits things hard but in the time it takes him to swing, the enemies have already clocked out for the day and eaten dinner with their families and are now watching the evening news.

Those are the ones I can think of right now!