I chose other for a few reasons.
Selvadorada: IMO it's still the most gorgeous world in the game. It actually makes you feel like you're in the middle of a jungle. I wish it was bigger but other then that they did a really good job designing it.
Forgotten Hollow: Again wish it was bigger but it's so unique from the other worlds. Darker then it is light, mix of dead and lively landscaping, the misty river/ravine with the huge rocks that adds to it's erie atmosphere. Also the dark yellow lighting at night adds to the erie atmosphere.
StrangerVille: Downtown area is the most coziest place of all the worlds IMO. Something about it just makes it really small town feel to it and I love it. The area at the top right of the map is great for a mid-century community of houses and it's one of my favorite neighborhoods.
If I had to choose my absolute favorite it would be Forgotten Hollow. I just wish it was bigger with different areas.