World of Warcraft
Played since a month after launch and finally called it quits in cata while playing it on and off again up to now where i think i'm officially done. Didn't do much progression in vanilla, finished a few raids in BC, and was in one of the top 100 raiding guilds' raiding teams in the US. Also did some high end arena in late wotlk and early cata before i quit. Also i reached gold cap before and after the change of the weird gold cap.
Final Fantasy
Love this series, i've played majority of the games in the series including tactics, chocobo chronicles , etc, with original systems and emulators, kind've been lacking lately with some of the newer ones like the PSP game and the FFXII-2
Team Fortress 2
Love this game, especially on the xbox 360, kind've wished they didnt add all the extra equipment you can unlock via the item mall to the pc version.
Those are the most significant ones i can think of, i've played a sh!t ton more but those are the top 3.