Best thing I could say about Fairy Tail is that it's probably the best, as in it's a balanced mix of fun and danger, (popular) shounen universe to live in. Just chilling with your guilds, doing requests, got magic powers, etc. sounds fun. As long as you stay away from Fairy Tail, you're relatively good to go as far as safety is concerned.
DBZ: You die every other day, no thanks.
One Piece: The navy sucks. Pirate sucks. The system is corrupt as fuck. Also a life on the seas is not for me. Even if I managed to join Luffy and co., I'd be terrified of Luffy's craziness, even moreso than Usopp.
Bleach: I don't want invisible ghosts/spirits to harass me or worse. Being a Soul Reaper is not fun either.
HxH: The only reason you'd want to live here is to go and become a Hunter, and uhh, that test would likely get you killed, so no.
YYH: Basically the OG Bleach in a sense regarding the spirits and demons, so no thanks.
EDIT:
Honorable mention: My Hero Academia: Hmm, a world where you can attend school to become a superheroe sounds fun, this would be the 2nd best choice probably, just pray to god you don't end up being Quirkless like Deku. Villains would uhh, be a lot more threatening, but hey, you have powers to defend yourself I guess.