-Shin Megami Tensei Persona 3 (FES) & 4 -Tales of Abyss & Tales of Legendia, but actually ToL is sort of subpar overall as a game -- you'll probably enjoy it you like the whole "Tales Of" series shtick however. -Odin Sphere -Wild Arms series (Like 5 in particular)
To honestly name a few. I don't know if I'm naming games you've already played, but there's no doubt that I look at these games as doozies on this amazing console. Also, sup bro.