This question usually crosses my mind in more of a "which world would be the most fuckin terrifying?" Like I'm usually playing a game thinking this would be the most batshit reality. Biggest one that comes to mind there is OG Bioshock. I remember playing that and thinking Sander Cohen was brilliantly done but absolutely terrifying. Can't imagine living that.
Not to hijack OP tho, uhh, maybe the Witcher? Again, also terrifying but if I'm Geralt I'm all good.