My fav 360 game is Call of Duty 2, this game is so fun, the SP it intense, easy at first, but it picks up good especially if you try Vetren mode. The online is amazing, its what has kept me hooked, they have fixed all the probs that it started with and its perfect.
NHL 07 i picked up a couple weeks ago and i have to say its the best hockey game ever, i love it. The new controls are so sick. Goalies are amazing, the puck acts on its own now and can slip threw the goalie like someone else was saying. But some of those goals are gay, but it makes it more realisic, but some of them are just gay.
Splinter Cell DA is sick, i got it on sunday beat it on monday. It was to short. Amazing game though, kinda same things as the old ones but some new moves and tools. It has amazing graphics but if i were to do it over again i woulda just rented this game since it was short.
Those are some of my fav 360 games