Most underrated worlds? Most overrated?

Underrated: Oasis Springs and, to a lesser degree, StrangerVille. I've often heard people say they don't like the desert worlds in the game because they all look the same. But that couldn't be farther from the truth, not even the neighbourhoods in Oasis Springs look the same, let alone StrangerVille which feels like a entirely different place altogether.

Overrated: San Myshuno, but that's a very personal opinion of mine. I do see the appeal, it stands out from the other worlds in so many ways (the unique big city look, the apartments high above the ground, the sheer size with 30+ lots), but I've just never been a fan of big cities in real life and prefer more remote locations in my game as well. Del Sol Valley is yet another city world I dislike for the same reasons, though I wouldn't say that one is overrated because almost everybody else hates it, too... :D