I had a really good world in the BetaA pack that had a desert bordering a meadow, with a forest and river within view distance. Unfortunately I deleted it and forgot the seed >.<I believe i'm probably going to play in a desert. I really like it, and it's nice if i can find a cool flat area, next to a river, near a forest. It once happen in a survival world. Ha...
Thanks for your detailed explanations!