Abyss. Though, unlike the others, I think the gameplay is solid. I actually consider the gameplay in Vesparia to be a HUGE step down, I felt like it was trying too hard. Haven't played Graces though (I will soon, because I'm getting a PS3). However, Abyss looks terrible, I'll warn ya. It's practically PS1 level graphics. After Symphonia, it's kinda sad. Vesparia's pretty, has a few really good characters, but is kinda vacant.