From best to worst: Archives, Jungle, Nightclub, Facility, Outpost, Memorial, Station, Industrial, Docks, Sewer.
Sewer is ranked the lowest for obvious reasons. Docks sucks because everyone loves to get their camp on in that one room. It's fun to see that same camping team play another map, like Archives, because most of them really suck when they can't back themselves into a corner and rapid fire. Archives is the best because you can go rambo with a shotgun. Same with Nightclub, Jungle, and Facility.