Live For Speed, Minecraft, Automation, Openttd, Richard Burns Rally!!
Civilization series (played them since the beginning of the series in the 90’s)
Mount & Blade and also Mount & Blade Warband (this game is so cool and unique)
Batman Arkham Asylum and Arkham City (well they’re a games about Batman, nuff said)
UFO Enemy Unknown (still one of the best turn based strategy games ever made, pretty exited about the new re-imagination of the classic UFO)
Deus Ex 1 & 3 (FPS that forces player to use their brains)
I also have very high hopes for Automation but obviously I wont count it in as one my favorite game because its not finished.
Forza 4 mainly, I spend way too much time on that.
Guild Wars 2
Portal series
the old 2D Sonic games :3
I play many games, but picking favorites is hard D:
“Battlefield 3” is a good game and loves to play it when I get some free time. I like the game because of the graphics and the missions which we have to complete.
Right now I am all about indie
Automation (of course)
Gnomoria (it is like dwarf fortress but you can actually play because has an interface)
Hammerfight (2d phisics choppers-with-big-stones-attached fighting game)
Running With Rifles (top down 3d multiplayer shooter, has bots and it is lot of fun in coop)
Factorio (this one I really like, reminds me of the old industry giant but it is also an alien tower defence where you build and supply and automate everything)
Hmm…
Automation 
Project Zomboid
Starsector
Mass Effect 1/2/3
Games everyone loves:
Edler Scrolls
Fallout
DOD:S
Games some love:
Forza 4
Gran Turismo 5
Minecraft
Batllefield 3
Game nobody knows of:
Postal 2
I continually play those games over and over again
Postal 2… Great game. I loved using cats as silencers…
haha fun times indeed 
So… here are my favourite games:
The whole Gran Turismo series
Need For Speed Shift 1 and 2
Automation (obviously)
Test Drive Unlimited 1 and 2
Dirt3
Need For Speed: Prostreet
rFactor
(11/11/2013) EDIT: Added rFactor and removed 2 games
My favourite games? Let’s see.
- Grand Theft Auto and Saints Row series
- Test Drive Unlimited (I have played this game a lot)
- LFS (Great physics, ideal for drifting purposes)
4 Need For Speed Series (from the first game to Most Wanted released in 2005, the rest is just pure crap, except Shift 2 which I really like
) - TES Skyrim
- Gran Turismo 2 and 5 (great games, I’am still playing GT2)
- Minecraft and other simple indie games (have you heard of Kerbal Space Program? Great game where you can build your own spaceship and fly to the moon )
8 Of course Automation
Minecraft
Forza Horizon
Forza 4
Automation
Rigs of Rods
GRID
CoD MW2
Euro Truck Simulator 2 (The first one was horrible)
Team Fortress 2
DiRT 2
CoD 1 (Yes, the first call of duty. Still my favorite multiplayer game of all time.)
Garry’s Mod
Sorry, I don’t really like SLRR that much.
here is a long list:
Fallout series
X-com (older games and the new one)
jagged alliance 2 (currently playing 1.13)
Modern warfare 3
Sims 3 (great for architectural practice)
TW Shogun 2
diablo 2 (3 is the GREATEST EPIC FAIL EVER)
NFS 1,3, porsche, U1,U2, Shift 2 and Ferrari legends which has turned to shift 1
cities XL
hitman absolution
command and conquer 2 and 3
Mass effect series
Kotor 1 and 2
point and click adventures (they are just too many to list)
heroes 3 WOG
starcraft 2
anno 1401
baldur’s gate
dragon age 1 + expansions
Civilization V
Minecraft (Feed the Beast)
Kerbal Space Program
Hmmm, that’s it at the moment Although it’s quite hard to have any more favorites when playing games this time-consuming. Although Automation might join the list as well, when it’s (closer to being) finished.
1 - Automation
2 - Rfactor
3 - GT5
That’s it. Have no time for others.
BTW: I would love to see a marriage between 1 and 2!
World of WarCraft (But not currently playing)
Diablo III
Forza 4
Forza Horizon
Skyrim
And yes, Automation, lol.
Battlefield 3
Street Legal Racing Redline
Forza 4/Horizon
Automation
- Combat Mission: Battle Of Normandy
- rFactor
- Rise Of Flight
- Il2 Sturmovik and sequels
- Fallout 3
I’ve REALLY been enjoying Hearthstone lately.