Bonus points for multiplayer coop that I can play with Julie on the same TV. Oh, and bear in mind that I already have GH for the Wii, and also the Lego Star Wars/Indie games.
Edit: I enjoy a mix of genres, but tend to play FPS games with a mouse and keyboard. The games we've enjoyed playing the most recently were Mario Galaxy(1 and 2) and Super Mario Bros, so any platformers (2 or 3D) are appreciated. We also enjoyed Lego Star Wars and Indiana Jones a lot.