THIS IS HARD I like a good few tales games for different reasons. I really love Xillia's battle system, for example, but I really miss Graces' eleth mixer, etc etc... I have a really soft spot for Abyss though, because my all-time favorite Tales character (Asch) is from that one. Yes let's go with that shallow reasoning.

also I am really bad at replaying Tales games because I try to make sure I do EVERYTHING in my first play through which is why... it takes me so long to finish a Tales game...