Mor Dhona is my favorite. Great music, great atmosphere, and I'm a sucker for when a MMO gradually builds up an area. Nothing can surpass the Nostalgia of the Rising Stones, and it has the Crystal Tower in the background for extra Final Fantasy nostalgia points. I hope it somehow becomes an expansion hub again or at least stays the home of the Scions.

Idyllshire is okay, but the goblin steampunk elements aren't my vibe, and I have to admit, the music there kind of grates on my nerves.

Rhalgr's Reach has a cool layout, good music, but I just don't prefer dusty areas.

Eulmore is ugly. I hate tacky opulence, although it did drive the story-point home.

The layout of Radz-at-Han is weird, and it doesn't really feel like a "city" to me. I like the music there but can only tolerate it in small doses.

Solution Nine is probably my least favorite. I don't mind some technology in my Final Fantasy, but this place just seems off to me. It seems completely disconnected for me from the world, which is maybe what they were going for, but I don't like it.