Thread stealer.

How about one that does not lag

A multi-level building with access points on the outside such as rappel points, ledges, etc. A large library where rooms from one floor to the other are similar, but with a central hallway, two large open stairwells.

I've been saying to my friends for a few years now that I would like to have a building similar to a skyscraper with say about 10 floors. Each floor is not massive but big enough for 3 to 6 rooms on each floor depending on the size of each of those rooms with a different layout for each floor. Two stairways on each floor leading to those floors above and below but some of the stairs are destroyed or blocked and with some holes in some of the floors/ceiling and some debris or office furniture etc that you can use to climb up or down floors where the stairs are no longer an option.

DETROIT... nuff said lol

As I mentioned in another post, MW3 is the first shooter (FP or otherwise) I've ever played/owned, so forgive me if the following is an idea that's already been used in any of the other COD games

Map Name - Rig

Map Size - medium

Description -

3-story offshore oil rig w/ both internal and external stairways. Moderately lit to eliminate totally dark corners, but not bright enough to eliminate some shadows. And no, you can't shoot out the lights!

Lowest level is heavy equip. storage (forklifts, etc) and repair - large, open bay area. Of course, on an oil rig, there will be explosive barrels throughout.

Weather - overcast

Keep your powder dry,

Wolf

Mine would be a medium map with a hill (2 1/2 floors high) in the center were the B Dom Flag would be on top.  I would have a few two story buildings in each spawn.  A bunker under the hill with an entrance on each side of the map and two entrances on top of the hill (on opposite sides of the B Dom flag.  Some foliage and sandbags on of the hill for cover as well.  But not too much.