I've been trying to figure out how maps are used in the course of game-play; what types/sizes/scales are used most often; which are less important but cool to have on hand; what finer points within the layout or terrain structure of each type of map makes it the most fun, useful for multiple games, and what would make it unusable. So basically, what would you want to see in a map, or map pack, for gaming? What would be amazing?

I know there are a lot of different types of games, many ways to play them, and even more perspectives and opinions out there. I'd like to hear them. Or, if there's already a discussion on this subject in another place--anywhere--please point me to it. You have my thanks!