Well, since this thread got necroed, might as well post mine:
What's funny, is that the top-4 aren't even my favorites(and some haven't been platyed for years).
And Skyrim does not even include all the "super-special-game-of-the-century" editions that I've played through at least once for every re-release.
QC is pretty much dead, TF2 is gathering dust in a closet since 2012 or so, and my friends are too busy to play Dota2 on weekends.
Also, if anyone likes RPGs and owns Skyrim - check out Enderal. Even though it's based on Bethesda's engine, it's pretty good. Even though the game has been in development for some years, and it's free, devs never slowed down the pace of improvement. I'm still getting bugfix notification from their bug tracker (even some non-critical errors I've submitted nearly a year ago got fixed).
There's not even a few of your top games you've invested a lot of hours playing you can name?
Potato is still green, I'm sure he'll get to that point eventually, but no need to rush carpal tunnel in a youngster
i spend lot times for final fight/kof/sonic wing/dungeon dragon/etc etc at gaming center
I used to work night shifts at the gaming center back in high school. I think me and my co-workers put in thousands of hours into Morrowind and Warcraft III: TFT.