I've been knocking out the free games I got through PS+. I finished Warhammer 40K: Space Marines, LittleBigPlanet 2, PAC-MAN Championship Edition DX, Gotham City Imposters, Virtua Fighter 5, and Sideways.
I'm currently working on Ratchet and Clank: All 4 One. It's not so bad. I've played mostly single-player, which is not recommended at all. The couple times I've played with my wife, friends, and people online were awesome. It's much more fun competing and working together simultaneously than it is to just bull through the game alone. The biggest complaint is the fixed camera, which can be REALLY annoying at times. Otherwise, it's a really fun game to play couch co-op or online.
After All 4 One, I'm planning to play Just Cause 2. PlayStation Plus is GREAT!!