Ethiopia for sure. Crappy land and boring gameplay. Even the game that I completed, covering all of Africa and some colonies, was no fun. Have to say that I haven't completed Mali, but at least you get rich. Fun, right? Maya, on the other hand, is awesome. You get North America all to yourself! Longbows or crossbows can hold off the natives, with a little luck Europeans find your North America settlements first and get no conquerors, and America succumbs easily to a bunch of cannons and muskets. The wonder for UHV may be tricky, but much less so than Babylon or India.