- a very open map, similiar to wasteland. I think this would be really fun and would be a break for the mostly confining space of other maps.
- large amounts of players. I think a party of like 16 players of your friends would be epic in a map depicted in my first idea.
- ability to change settings. It would be awesome to be able to change the settings to make things like insta-kill, only headshots, set starting weapons, unlimited money/ammo, invincibility, change difficulty, etc.
- a machine that allows you to buy ammunition. Everyone knows it sucks when you don't have anymore ammo.
There is more but I can't think of anything.