I'm beating the original metal gears. I replayed MGS 4 and it's online a whole lot, I beat Blue Shift and Opposing force (although sadly I'm not quite done with the original half life), and other than those games I've just been re-rotating through a whole buttload of old games.
Like, I've spent at least a day playing...
SOCOM II single player
SOCOM 3 single player
Ace Combat zero
Counterstrike (lasted a weekend where I didn't come out of my room)
Day of Defeat (same weekend for most part)
Company of Heroes
World in Conflict
Portal (i've beaten it a thousand times)
Bad Company (rented and then never beat it)
Haze (rented it after selling it cause my friends made me, and wow it's still shit)
Crysis
Pokemon Crystal
Warhawk
I'm still playing GTA iv, some MGO, and of course GH3. Hoping to do some assassins creed or GTA IV or COD4 replaying soon. Maybe even rebeat mgs1 again.