SILENT HILL
because it's scary as fuck and something is always happening.
...or final fantasy because I'm a woman.

That's a toughie, but probably either Tekken (my love of beating the crap out of things) or Kingdom Hearts (Disney ftw).

I would be part of the bioshock universe for the pasmids and I would save rapture

If I had to pick a game-verse I'd wanna LIVE in, I'd have to go with Hyrule, from the Legend of Zelda series. It's gorgeous, pastoral, and with just enough critters to keep things interesting.

Animal Crossings, because it's super relaxed and I could go dig up fossils and crap XP I know it's laaaaaame. But hey, whatevers.

Fat Princess

Monster hunter

Killing giant lizards for profit

Final Fantasy XI, but that's kinda cheating since it's an MMO. In a way I'm already a part of that universe.

Alright it had to be said. WoW as a Horde sided human sitting in TB spitting on things as they walk below...boring day sorry. XD

Sam and Max, because awesome hilarious stuff happens all the time without any serious consequences. And there are talking rats.

LEGO

POKEMON

TETRIS

Battlefeild 2142 because all teh guns have holo sights 8D

Brütal Legend!

Scribblenauts.

I can make anything!

Left4Dead

because zombie apocalypses are the best
especially with your bro's :D

Elder scrolls, cuz its made of win

I wanna be a S.T.A.L.K.E.R., drink vodka and eat breads, scavenge through mutant infested buildings, die terribly all the time~

Motoko-Chan's Wonder Kitchen. Because gnomes turn into hot dogs and mayonnaise is awesome.

Lol, Flower~
I'd be happy and calm ALL THE TIME.

Honestly I'd probably pick something lame like Fable2. D:
Because while zombies apocalypses and shit are fun, they're only fun because you can turn them off. I wouldn't want to meet a tank in real life.

DEVIL MAY CRY & God of war !! I would be ina state of constant kick ass and stupid sex jokes or final fantasy cuz then I could be iin a class like monk or like black mage.....or lineage cuz then I can be a light elf who KICsK@$$....or..or OMG THERE SOOOO MANY (TT_TT)

Xenogears

High level and low level tech mixed in the same world, all the places you want to go are a hop-skip and a jump away.

Plus if the world had it's background music that'd be fun... for like a day.

KATAMARI DAMACY

ROLL SHIT UP TWENTY FOUR SEVEN AND TURN THEM INTO PLANETS WITH ALL MY COUSINS

NANAAAAAANANANANAAANANANAAAA~~

Heavy rain!

Use the ari glasses and look cool.

press x for JAAASSSSOOOONNNNNNN

I'd probably pick the Anarchy Online universe. Rubi-Ka has some pretty nice spots to chill, has lots of futuretech that I enjoy, and has weird things to look at. Plus, there are still corners of Rubi-Ka and the Shadowlands I haven't explored yet.

Interstate '76.

Homeworld, because it's fucking AWESOME.

Well, I would probably say Ever Quest just because that is the game I have spent the most time playing. And yes EQ is crap now, but it wasn't a few years ago.

OR

Fallout, because it is made of win.

A_A Wow. Some people are masochists.

Be apart of any video game universe? I would probably choose none. All video game universes (with a few small exceptions) contain huge big bads that would eat me alive before the hero even gets his first side quest. Regular ol' humans are fodder. I'd stick with animal crossing, in that case.

Now. If I were, say, a main/main-ish character in the game, with equal abilities, I would probably pick the TF2 universe. Fun, mass slaughter, with infinite respawn! Plus, telepathic abilities with machines! (Spy's sappin' my dispenser!) Though, I suppose a close second would be Poke'mon.

Kingdom Hearts probably opens up the most possibilities. Worlds to explore, different forms of interaction, and if I happen to be a Keyblade master? All the better.
World of Warcraft (chosen because it's my personal favorite MMO, but just about any MMO works for the following reason) due to the vastness of travel options and so many possible things to do or be. Also death isn't permanent, if I was a PC I could spirit run and if I was an NPC I could respawn after being killed by characters >.> Unless I was supposed to die as part of a quest and stay dead. (Makirk's wife) that would suck.
I seem to like RPGs or similar.

Street Fighter.

Hell yes.