What I really like about the Persona games, especially 4 is how much personality the game has, which both earn my thanks to Atlus and Atlus USA.
The Localization job has been top notch, and by top notch I mean not just translating everything word by word but also making things more appealing to the US Audience.
Then there's the actual game itself that really just has that charm to it, and never lets go of it the entire way through. It just has that sort of bizarre yet acceptable feel to it. Persona 4's facing the shadow version of your characters are applauded big time for that, so big props to the designer there. They were able to create bosses that absolutely had to do with the Shadow's personality.