No round circle maps
Amen!
Although I drive a Mercedes-Benz, I don't like the maps designed like the logo of it! The globe is round, continents aren't.

I like Baltic, just because it isn't threefold symmetrical in every detail. And I can find my hometown there

Mindanao was nice, although statistically one of the areas was quite certain to lose the war, if I remember right. Circulating chess pieces on the map at reset gave each country equal chances to win due to an advantaged starting position, so no hard feelings being on the losing side every once in awhile.
IMO it would be nice with more real world maps arranged for gameplay. They would add some twist into the gameplay, since there would always be someone fighting for his hometown. Just as it is with the Baltic map, or the Mindanao, they needn't be historically correct fighting places, just dots with names on the map. How about a map of the British Isles, with England, Scotland and Ireland against each other? Or the Great Lakes dividing the three Chess countries in the Michigan, Wisconsin and Ontario area? Would you like to play on maps like that?
It's the Main Arena maps we are discussing here, right? They need more than just the Terrain Editor to be usable and in circulation. Excellent historically correct maps for scenarios and AVA are already plenty available thanks to enthusiastic map makers.