Wish list for generic flip-mats:
Dwarven underground colony/outpost.
Gnome forest encampment or village.
Treehouse village.
Winter encampment/outpost
Slaver outpost/workcamp
Floating village on water/rafts
Underwater colony (domed/intact-not ruins)
Camped caravan (circled wagons)
Landscape with geothermal features (geysers, hot springs, etc.)
Mine complex
Underground insect hive
A forge/metalworks or other large factory.
A zoo.
A large farm.
A border station.
Large bank.
I'd buy every single one of these.