Neverwinter Nights has a rabid community that is constantly adding it's own updates along with Bioware. Someone recently released 2 tilesets for Sigil, the main town in Planescape. It also has several servers still that are player owned and running. I did belong to a guild once that was a RP guild that allowed you to turn your character into just about anything. I liked my goblin. They had several servers with several worlds, and game master events. So, it's worth a try. Personally, i loved making worlds with the editors more than playing.
The next installment, Neverwinter Nights 2, is supposed to have an even more robust editor, and better EVERYTHING. I am truely looking foward to it.