I hate minecrafts terrain generator and can never find a good spot to start building in my survival worlds. So I usually go into world edit and terraform spots to start building, I figured I may as well upload some of these worlds in case anyone wants a nice building area but don't want to terraform.
I spawned some main friendly mobs around and tried to keep coal and iron ore in the custom mountains so that you don't have to leave the island just for some basic stuff.
Hope you enjoy and if you want any other types of worlds just let me know and I might be able to make one for you.