I don’t know what to say about city maps, maybe partially city, or village, with some vegetation. A pure city map would as mentioned above, remove some balancing mechanics, i don’t think i’d like to play as the Predator fighting in narrow alleys. :p
What i really want to see is a map with coniferous woods, scandinavian forests, wooden cabins, cottages, meadows, farms, barnyards, those kind of things.