So what is your favorite game of all time?

Mine might be Oblivion. A lot of memories, fun and hours can be found there.

If I had to pick just one, probably the one I list in fave lists all the time...Dungeon Keeper/Deeper Dungeons.
Diablo1 and Casear3 would probably tie at 2nd. At least tonight. Ask me again a month from now and I might say something else.

Tough choice....its either between The Sims (and all its successors ), Animal Crossing, Oblivion, Alpha Centauri, Dragon Age 2 or Mass Effect 2.....

Right now I'm having a bit of a DA2 addiction but I'm sure that will pass. I'm going to go with The Sims series...

Between Morrowind, Crusader Kings, and King of Dragon Pass.

Planescape: Torment or Baldur's Gate (II).

Thief, Morrowind. Just can't pick one, they are like my children.

Morrowind.

Deus Ex, followed closely by Morrowind.

Zoo Tycoon Complete Collection, Rollercoaster Tycoon 2, Peggle or Age of Empires.
These are pretty good contenders.

Hide 'n' Seek

Morrowind

Morrowind, followed by Deus Ex 1, Planescape and Gothic 1.

Hearts of Iron 2

Final Fantasy IX

Ocarina of Time or Final Fantasy 7.

Possibly Morrowind.

Then again, I've killed a lot of hours on the Civilization series. Especially Civs 2 and 4.

Red Dead Redemption.
Made me laugh and cry.
Best campaign in any game. Ever.
DLCs were good too.

Halo Combat Evolved mostly due to good childhood memories, it also lead me to loving the series and the universe.

X-Com...

Carnage Heart if I could ever figure out how to program. Did have the best R&D

Deus Ex, Deus Ex, Deus Ex, Deus Ex, and....Deus Ex. Oh, and Morrowind is right next to it. I suppose Persona 3 is up there with them as well, being my favorite SMT game and JRPG in general.

The Sims are nice! The second series was my favorite game series when I was younger. The third one I first played a year ago, it's very good too. I still have to try the original.

None.
The ones that are tied could probably make a few good paragraphs though.

The Legend of Zelda; Ocarina of Time
Final Fantasy X
Oblivion(I played the crap out of Morrowind but for whatever reason I have yet to finish it, got it on PC fairly recently though so gonna give that a go over the summer when I have more time)
Dragon Age
Might and Magic 6 & 7
Age of Empires 1 & 2
Age of Mythology
Civilization(1st one)
Empire Earth(1st one)
Heroes of Might and Magic 3
The Legend of Zelda: Majora's mask
The Legend of Zelda: Wind Waker
The Legend of Zelda: Twilight Princess
The Legend of Zelda: Skyward Sword
The Legend of Zelda: A Link to the Past
Fallout: 3
Fallout: New Vegas
Final Fantasy XII

All tied. There are more but I will be nice.

http://www.unikgamer.com/users/generalmills44-2294.html

Morrowind, The Longest Journey.

Pathologic. I love it and I hate it.

Half-Life 2 or Red Dead Redemption. Both had a great story.

Tie between Deus Ex and Morrowind.

EDIT: Forgot about Red Dead Redemption. That's up there too.