I've been playing Dissidia 012 Duodecim, and its damn ADDICTIVE. I got this game a loong time ago, but for some reason I just never got around to playing it. Well, I randomly decided to start it up, and suddenly I found myself glued to my PSP for entire days, just playing this damn game.
It's not just the awesome, fast-paced action or the super fan-service selection of characters. Duodecim maintains that RPG element from Final Fantasy, so there's a lot of leveling up, mastering a HUGE list of battle skills, and farming for items so you can craft the best equipment. I literally spent hours just trying to get the rare components you need to get each character's ultimate weapon.
There's so much to spend your time on, and the story mode is long as hell too. I've pretty much decked out Tifa, Yuna, Lightning, and Cloud with mastered everything at Lv.100. That's how much I've been playing. It has much more content than the first game, and the new characters are great, so just pick up and play this game. If you're a Final Fantasy fan, it would be a crime not to play it.