[Butz]

I think it would be interesting to see a server where towns start off as small settlements with a few NPC buildings, such as a weapon shop, item shop, mayor's house, etc.
As players join each side, they can gather materials to build their own house. After they get the materials, they trade them for an item which can be given to staff in exchange for building their house in the settlement. For players that aren't good at level design, stock houses should be available.

As the settlement grows, more money will be generated through taxation of the citizens. In turn, this can increase the quality of weapons and items for sale at the shops. There could be three major factions, each with their own borders, and all in a state of war as they fight over neutral lands in the center of the world.

New settlements could be placed, and also attacked and destroyed or captured by opposing forces. If all of the settlements belonging to a faction are destroyed/captured, they can then become a guerrilla group, fighting to liberate cities and regain their position in the world.

Each settlement would have NPC guards, the amount and strength of which would be determined by how large the settlement is.

When killed, a player would drop their weapon, as well as a portion of their money. All newly spawned players would start with a basic dagger/short sword.

Just an idea really.