Smash bros, mario kart, thats about it.
The stuff I've seen on assassins creed makes it look like the running around towns would be a ton of fun but the battles look like the controls will be really clunky and boring. I don't have a 360 so I won't be getting it anyway, but it does look interesting. If I had a 360 I think Fable 2 would be something I might get when it come down in price, I played a few hours of the 1st one and it was pretty fun, even if it was as short as I've been told.