Shadow Falls is the worst ONLY BECAUSE people don't know it. That is why there are too many draws. Even if most people playing it at once know the map fairly well, it is still pretty damn hard to find a camper or two. I feel that it SHOULD BE one of the better maps as long as you know the definition of teamwork. It can be ALOT OF FUN!!!
So with that said, my vote goes to Rat's Nest. Complete crap
I hope for Socom 3 you can have the option of day/night and possibly even weather conditions