Just finished Kingdom Hearts: Birth By Sleep and absolutely loved it. The story was surprisingly good and I found myself rather liking all three protagonists (which made the ending all the more painful, if expected, being a prequel). They've also managed to actually integrate all Disney worlds into the plot and the character's development (something they've failed to do since the original game).
The combat is also the best in the series so far, giving you more space to costumise your character's skillset. Also I liked that for once the game couldn't be beat by button mashing, having actually died a couple of times. It's algo incredibly fun, in that I've lost countless hours fighting random mooks, not for the purpose of grinding, but because you feel absolutely badass while doing so.
All in all, it was a fantastic game that might just surpass the original in my book. I certainly beats it's other predecessors (or sucessors, storywise).
Also, Aqua is an absolute gamebreaker. She'll dodge anything. ANYTHING. I've had her run right thorough the middle of giant enemy beams, clearly being hit, yet not taking any damage.