NWN2:SoZ was an excellent example of multiplayer for this type of game. Admittedly not having the actual responses voiced would take away from the experience from a single player stand point but to me it felt more like an actual pen and paper game. My friends and I played 3.5 for years before college/lives got in the way and having that to fall back on helped us feel like it we were all playing together again. Just looking at what Obsidian has already done reassures me that they can implement multiplayer into the game and still have an amazing story for the main campaign.
Kibosh - Vagabond of the Obsidian Order
