All I play is NWN multiplayer, I have never played DS before, so I have no opinion about it.
Nwn multiplayer is great, you just have to find a server that fits your playing style (hack&slash, rp, or a mix of both). There are 100's of servers to chose from connecting to gamespy through the NWN client.
I highly recommend that you try several servers, and play them for a week or 2 before making a decision.
BTW, I highly recommend a server called "The Adventurer's Domain." I have been playing on it for almost 2 years now. It is a very unique and customized world. You can look me up as either "Daine" or "Quikblade" and I would be happy to show you around and give you some pointers!
See ya soon!