IMHO
I guess for me, a map is more than just a picture. I have collected maps that are a sheer joy to behold. I made custom tiles for "HexMapper" to get a more polished look and feel. So I can't deny I judge artistic presentation first.
But more important to me is the map itself. What is it really showing me? I begin to ask myself questions. Such as, what kind of civilization is this? I begin to wonder about confrontations with other peoples. Where does their food come from? Where are the trade routes? Which cities have the monuments, temples, wizard schools, arenas or powerful guildhalls? How do I get from one city to the next? Is it over the mountains or through the woods?
Maps are about information and navigation first. Now most any map by nature addresses the former. But for the latter I feel a hex map does it best, in relation to the needs of the game.