I've put some thought into this and because posting a longish response works better in a regular blog format than a Facebook post, I'll share my response.
Narnia - either deal with the White Witch, who's pretty much Satan, or live in a theocracy under Aslan who's pretty much Jesus. There's probably some other stuff from the other books but it's all one big Christian allegory.
Hogwarts - probably the way to go. If they mean Hogwarts circa Harry Potter, you're deal with England circa early to mid-90s, which isn't awful, plus you've got magic. As long as you keep your head down, you probably won't deal with the crazy stuff Harry and his friends had to deal with. If it's modern day, then great - you can do magic in peace, though there's all sorts of messed up things about the wizarding world but I guess you could live amongst muggles and do magic on the sly.
Wonderland - you have to deal with the White Queen who's absolutely insane, and deal with all sorts of other crazy characters who seldom adhere to logic or reason.
Camelot - don't know enough of the Arthurian legends, but sounds like it's just Medieval England which means life would be pretty crummy.
Neverland - might not be too bad - Captain Hook might bother me or something? I have no idea what I'd do if I was an adult in Neverland.
Middle Earth - get to go on adventures and get gold and glory, but if it's LotR era Middle Earth, then I have to worry about the forces of Sauron pillaging my village or whatever. Living in the Shire, smoking pipeweed outside a hobbit hole sounds tranquil though.