Well, alright, currently my list looks somewhat like this:
Age of Empires III (for those last LANs)
Left 4 Dead (also for LANs)
Elder Scrolls IV: Oblivion (it's addicting)
Prototype (still haven't beaten it, I like to simply wander and try powers on infected areas
)
X-Men Origins: Wolverine (I play it occasionally)
Lord of the Rings: The Return of the King (An old, but really great button masher)
Call of Duty 2 (I got hold of it to go back to those good old memories with the first titles of this series)
Overlord II (Also an occasionally played game)
And I beat Gears of War, playing it on coop with a friend, connected through LAN, in one week.