Ooh, that's a tricky one. There are plenty of RPG worlds I'd love to visit, but since they're famous for having barely-missed apocalypses, they would also be pretty harrowing places to live in.

I guess Spira (Final Fantasy X)? The apocalyptic crises would be a problem, but there's plenty of interesting things to see and a pretty modern level of technology with enough differences to be interesting. It does have a problem with religious zealots and racism against people from desert countries, but so does Earth. :p