Not at all, I just focused on the request to have casual-friendly multiplayer.
If you want other games I would include:
-Gears of War 3
-Dead Space
-Assassin's Creed
-Call of Duty MWF3/BOps/BOps 2 (very obviously designed for console)
-Prince of Persia (2008)
-Final Fantasy XIII
-Ultimate Marvel vs Capcom
-Resident Evil 6 (if you like the recent RE games, otherwise pass)
-Bayonetta
-Borderlands 1 & 2 (definitely designed for console, though the PC version is pretty good)
-The Witcher 2 (I would recommend this for PC first, but the 360 version is excellent)
-XCOM: Enemy Unknown (I have the PC version and its great, but it's really designed for console, so YMMV)
-Metal Gear Solid HD Collection
-Spec Ops: The Line
And if you're a sports gamer:
-The latest version of FIFA
-SSX
-UFC Undisputed 3