Gaming for 30 years...competitively and casually. All genres, been for years in multitude of competitive guilds/clans and prefer PC over consoles. Joined steam recently in 2009 since I am not a fan of DRM.

As mentioned played pretty much everything but my love are RPG's in both
mmos and co-op, single player. Dont mind jrpgs but prefer western.

I probably have over 100+ titles that I really love but in no specific order I will list just 15 sp here and 15 mmos I love (some of them Korean)

SP:

Dark Souls
Planescape Torment
The Baldur's Gate series
The Icewind Dale series
The Elder Scrolls series
The Witcher series
The King's Bounty series
Quake 3
Uncharted series
Heroes Of Might and Magic series
Disciples series
Mass Effect series
Neverewinter Nights series
The Fallout series
Half-Life 2
Dragon Age series
Gothic series
Starcraft series

mmos/team/co-op:

Myth Of Soma
Counter Strike
Dark Age Of Camelot
Everquest
RuneScape
WOW
Aion
Guild Wars 1/2
EVE online
Lineage 1/2
Unreal Tournament
League Of Legends
Age Of Conan

Honorable mention goes to Halo:Combat Evolved which was a ♥♥♥♥♥ to master with gamepad.