The good thing about NWN is that it offers an effectively unlimited supply of community-made modules to play, many of them high-quality.
The bad thing, perhaps, is that since there is an effectively unlimited supply, you can keep playing them indefinitely until you get somewhat bored, as one will eventually get bored with any game if one plays it exculsively for a long enough time. It sounds like that may have happened to you. NWN offers enough variety to put off that point of boredom much longer than many games would, but it will not necessarily do so for everyone forever.
I am speculating here, since it is hard to respond without you being more specific about what you have been playing and why you are unhappy with it. Perhaps you need to take a break and try some other games, after which NWN might seem fresh again if you come back to it? Perhaps you want to try some of the more outside-the-box modules? Is there something in particular you think could be done in a module or PW to make it more interesting to you?