The Pokemon world: If you are an NPC, three things are bound to happen. 1, A ten year will beat the shit out of your pokemon and take your money, 2, you're going to get robbed by a criminal organization and 3, you and the rest of the people of the world are going to be threatened by a legendary pokemon awakened by said criminal organization. Not my idea of a fun time.
Dino Crisis: A lot of people would say Resident Evil, but living in the world of Dino Crisis would be much worse. Zombies for the most part are slow and somewhat predictable with the occasional fast zombie or B.O.W. Dinosaurs however are mostly fast, vicious, hard to kill and can be stealthy. Let's just hope zombie dinos don't ever happen.