White Knight Chronicles II is one of the most enjoyable JPRGs on the PS3.
Huge value - it's basically 3 games for the price of one - you have the adventures of WKC1, WKC2, and the online components which feel like a whole game by themselves.
A lot of stuff to do - from going through the story to completing the hundreds of various available sidequests to completely costumizing your character and party to building your own town to creating your own weapons and armor, to playing online with other people (and that's not even everything) - WKC2 is a game that can easily last for hundreds of hours.
Story/chracters/setting - in terms of these 3 aspects, the game is one of the most traditional JRPG experiences available these days. So anyone craving a good old fashion story or that feeling of discovering a whole world should definitely try this.
Combat - while it may seem easy enough at first, when the combat opens up it becomes a total blast. It's most definitely not one of those games where players can go on auto mode for the vast majority of the game and just pay attention in boss fights - here players will be kept on their toes most of the time. Preparation, careful tactics, and attention to what's going on are required. The game is definitely challenging, but that only makes it a lot more fun.
Music/visuals - The game looks and sounds great. There are a lot of memorable tunes, and the detail in both the world and the characters themselves, from the facial expressions to the battle animations to the details of the armour, is quite impressive.
Online - it's a lot of fun to go on quests with other players, or get them to visit the town you created from scratch, among a fair share of other activities. The fact that the online community is extremely friendly and helpful only strenghtens the experience further.
All in all, I definitely recommend this game to JRPG fans (or even non JRPG fans I suppose, if you're willing to try something different), just be warned though - once you get into this game, it'll be hard to stop playing!