Funnily enough, I got my copy of the Persona 4 Golden Solid Gold edition which I and started playing that on Saturday. I've put in 25 hours so far. My backlog is starting to get seriously ridiculous. It's five games long on Vita alone.
How is it? I played the hell out of Persona 3 FES; had a blast with it. Never tried Persona 4, but I watched some of the anime.
I feel like before I answer your question, I should first explain my current state of mind with gaming. This will be short. I played FFXI for basically eight years. During that period I also tried other numerous MMOs like EQ2, WoW, LotR, EVE, a few others and some F2P games. FFXI has largely destroyed my love of conventional gaming. I still get excited about games, but when I start playing them, it feels more like a job than anything else. I want to be excited about games, but I feel permanently burnt out on them. Vita has been an absolute breath of fresh air for me. I still feel the same way about most games. I played Uncharted Golden Abyss for about five minutes before moving into Lumines. I still have yet to finish Gravity Rush, Disgaea 3, Rayman, Soundshapes, and a few other games. I've mostly played Lumines and Tactics: War of the Lions. I've put a lot of hours on my system since buying it at launch but it is still incredibly difficult to get excited, play, and finish games.
That said, Persona 4 Golden is an amazing. I actually got Portable 3 when it first went half off shortly after Vita launch but I didn't play it much (another victim of the blahs). Now I fully intend to go back and play it. I already have a moderate interest in anime so that is a plus. The game is just phenomenal so far. Without a doubt, this is the best RPG I've played since Fallout 3 and Final Fantasy IX (yes that's 9, not 11) before it. I can't recommend it highly enough. If you don't believe me, check its aggregate on metacritic: Current 95% with 20 reviews.
If I didn't already have a Vita, this would be the system seller for me. This absolutely vindicates my purchase in every way. I have already gotten thousands of hours out of it though. Lumines is ridiculous addictive. Edited, Nov 28th 2012 7:57pm by Paskil