Borderlands for starters, the styling is cool, Claptrap is hilarious and the overall setting seems like an explorers haven but try as I might I can't get into it. It's incredibly lonely as a single player experience which I guess I should have expected as the game is designed to be a multiplayer co-op experience, but not many of my friends bought the game. I did manage to play couch co-op with one friend and that wasn't much better, I guess you need four people to get the proper experience. That said Dead Island follows the same formula and I'm currently going through it with one friend and having a blast.

Gonna second Persona 3 unfortunately, at least think it was 3, I rented it for the PSP a while ago anyways. It seems like the sort of game I'd enjoy but it just took way too long to get going, and when it did I wasn't impressed.