I want a jungle set. Some of the Conan stories, the "Source of the Nile" board game, and real ruins from Angkor Wat to Zacpeten, would be good inspiration. A volcanic region could be good, too -- every true villain should have a volcano lair! It needs to have coastal hexes, so you can build your own Iceland or Hawai'i. And maybe a "wastelands" set with toxic lakes, mysterious ruins, etc. That could be all kinds of fun. How about a cave? That might be a bit more complicated, but the possibilities are immense. Weird civilizations, fungi of all kind, underground seas -- look at the game "Downcrawl" and make us hexes for that! Oh, and while I'm wishlisting things, Hexcrawl Toolkit II!