I play with a plethora of players in many games, but for the past few months have put in hours in Borderlands and F.E.A.R. 3.
4X Co-op in Borderlands has to be some of the best laughs and satisfyingly challenging game-play around. We usually spec out with @tlchicken as the "Hunter", @Q_Baller16 (chicken's brother) as "Soldier", @soulz2003 as the "Berserker". I (@heycarnut) generally play the "Siren".
Chicken is expert at clutch saves with some brilliant hip-shooting magic, Q keeps the team going with health, ammo, and seriously smart tactical use of gun turrets. Soulzz lumbers around as a general nuisance to the enemies, keeping them busy while the rest of us pummel them with lead.
Sandwiched between general hilarity occasionally punctuated by a little friendly griefing are moments of super rewarding teamwork. I nearly always finish a game session with these guys with a smile on my face.
Rob (Heycarnut)