Ultimately, I would vote for maps in the following order:
1. ZenEurope, because I just love playing on maps of the "OLD world" and it looks wicked PRETTY PRETTY PRETTY.
2. Adruia, while it is not quite as pretty and is not Europe, it looks wicked crazy.
3. Cradle, because it is still kinda pretty and kinda crazy and kinda zesty-spanky-pow-dunk-sassy.
The math stuff is over my head - - - so I gotta grasp at aesthetics.