I've always enjoyed Co-op games where people actually need to co-operate to succeed. I really like the music and art style, though I hope the game itself isn't too short.
One of the things that I really hate about this generation of consoles is the "death of player 2". I bought a second dual shock with my Ps3 because I was intending to play with friends, but it mainly function is to replace my controler when it is out of juicy. All the co-op multiplayer, are now only online... or most.