Tales of the Abyss is a part of the "Tales" video game series. The best in the series in my opinion. At least out of the titles released in the US. Unfortunately a bunch of the titles don't make it out of Japan, and the last one that did I wasn't able to play because I don't have an Xbox. But I digress, Tales of the Abyss was what all RPGs should strive to be. It had a great story, great music, great characters, and most importantly, a great battle system.
The Tales series doesn't have your traditional RPG battle system. Once you run into enemies on the map, you enter a battle where you tap X to slice, tap square to use a skill, and quickly enter the item menu and such by tapping the triangle button. You'll see similar battle systems in games such as Star Ocean and Eternal Sonata, but as far as I'm aware, this is the series that started it.
But back to Tales of the Abyss, you start off this game as an angsty teenager (like most JRPGs), but as the game progresses, you become a not so angsty teenager who is actually pretty awesome, and... I'm bad at explaining. Just go play the game if you haven't. And if you have, good for you. You know how awesome Jade is. Oh, also it has a kick-ass opening video.