I love all the combat and that, but the stuff that happen at home is rather boring.
First episode of season 2 wasn't that great, but overall the serie is awesome. :D
The original NWN isn't a great singleplayer experience. The expansion packs have a bit better campaigns, but NWN's true strength is custom made online and offline content. If you're into making your own scenarios, then NWN and the Aurora toolset is perfect for you.
The singleplayer is just horrible, but there are many intresting custom multiplayer modules.
And yes, expansion packs are required, but NWN is mostly sold as a 3-in-1 package with all the expansions.