Definately MM Maps.
Just Remember Swedish Town. Once there were around 230 players on this map and around 50-60 russians were hiding in a small house. There were around 100 enemies next to the stairs. and almost everyone went to charge. We tried to shoot them but we were only around 50 people. There was smoke.. everywhere (also a nice feature I really appreciated) So many teamkills... But I jumped out the window
Sadly I died because of fall damage...
There are so many great MM maps. Maps like Sjotofta... almost every map.
For those who don´t played MM.
Here are some Screenshots about our old MM Maps.
http://forums.taleworlds.com/index.php/topic,236273.msg5649944.html#msg5649944
But!
The Maps in NW are also fantastic. They are beautiful and there is almost nothing wrong with them (my opinion)
Only these two urban maps are not that good.
As soon as one of these maps is on the EU1 Server I just hear complains about them.