I could just never really feel attached to the worlds that changed around. I'm happy enough with one, but I don't mind little changes like an island appearing from water or something. I just prefer having to take longer to explore the one world.

I don't mind changing worlds, and I must admit I really love the idea of having two worlds at once a la FFXIII, but with traversable world maps and a method of traveling between the two worlds. That would be funky.