I'm not going to speak for everyone, but I usually prefer maps that have both group camps and loner dens, preferably not looking too unrealistic, as well as lots of area to explore An example of a realistic-looking group camp would be a cliff-side with caves in them, or a forest clearing with fallen trees and bushes to separate dens. A realistic loner den might be a little dug-out (ex., rabbit hole), or a hollow tree that had fallen. An unrealistic group camp would be a bunch of caves in the middle of a grassland or otherwise flat area. An unrealistic loner den would be, again, a random cave out of nowhere that doesn't quite make sense. A few rocks piled that have just enough space for something small to curl up is fine, but the default cave mesh doesn't always make sense.
Another map that I, personally, would be interested in would be a "photoshoot" map. This would be a rather large map with a variety of separate areas representing different habitats for taking screenshots. For example, a medium sized square of forest with thick foliage such as grass and bushes, as well as a few boulders, a creek, and some hollowed-out logs; at the end of it is a clearing that has a textured wall that you can walk through, and then an equally sized swamp area. This kind of map would be mostly for taking shots of presets in a habitat where they'd make sense to be. The entire map itself might lag a bit, so is not the most ideal choice for some computers, but it's not the type of map to be used for roleplay, so a little bit of lag wouldn't hurt too much.