I had never thought about living in the TWEWY universe. That would actually be really cool, and add some pizazz to death and the afterlife.Scarecrow 8 said:The World Ends With You.
Mass Effect.
Mass Effect wouldn't be bad either, what with aliens, interstellar space travel, and biotics.
Personally, I'd pick Pokemon, because it's not dangerous and could be a lot of fun. I still haven't let go of the fantasy of being a Pokemon trainer, so I'd choose that world.