1º Lemoyne: Saint Denis, Bayou NWA, Scarlett Meadows... Nothing more to say.
2º New Hanover: Roanoke Ridge has the perfect dark oppresive atmosphere for the end of the story. Emmerald Ranch posibly one of the most open, peaceful and beautiful areas of the game.
3º Ambarino: Cool mountainous area where to escape from the events of the game, free roaming far from civilization.
4º West Elizabeth: The east of it is like west New Hanover, the west has Great Plains, that adds some variety. Sadly it feels a bit small in my oppinion to be "Great Plans", and isn't accesible in story free roam, wich is sad because the second biggest city of the game is here.
5º New Austin: A last minute addition that gives the impression of being unfinished and without content. They didn't even bother to put up the same models for McFarlanes Ranch and the Tumbleweed mansion.