Persona 4 Golden is your best pick from this excellent franchise. It’s easily accessible, looks great on the Vita, and though it's 80+ hours long, the fact that it's on a handheld makes the length easier to swallow. As far as JRPGs go, this one rates pretty high on the J-scale; it takes place in modern-day Japan, with most of the cast made up of a gaggle of hormonal high schoolers. Don’t let that discourage you, though--P4G isn’t just a great JRPG for haters of the genre, it’s a gateway drug that will make you want to try more.
The modern setting is a refreshing change of pace from the fantasy-based JRPGs, and the grinding--one of the genre’s most hated mechanics--is actually pretty organic and addictive thanks to interesting, varied dungeons and a stellar combat system. Plus, you won’t be fighting all the time; there’s so much to do in Persona 4 (like taking midterms, dating, and part-time jobs) when you’re not battling demons. Sure, you’ll want to stop an evil force from destroying Japan with an unsettling fog, but you’ll also be pretty intent on not letting your three girlfriends find out about each other.