Well, now that I've finished BD and "Gothic2 - Night of the Raven" I'm looking for a new RPG to play and I remembered that I totally missed out NWN. So can anyone quickly explain what the deal is with the add-ons.. are they totally new games that can/should be played after the original NWN or will I gain anything from buying and installing the add-ons right away? And are the add-ons worth anything in your opinion?

- Telemachos