I LOVE Tales of the Abyss!
It intodruced me into the "Tales Of" series. One of my aboslute favourite videogames I've played it!
Wonderful story and characters and a great battle system. The story made me smile in some moments, but also it almost made me cry.
Xillia is great too, but I still prefer Abyss.
I'll buy Zestiria, if it's out in Europe.