I purchased Neverwinter Nights about a year ago, during a period of time when I was feeling “D&D deprivation” particularly acutely. It’s been a blast to play, and I’ve really enjoyed it.
For Christmas, Tarasine got me the “Shadows of Udrentide” expansion pack, and that was fun to play. Like the original single-player campaign, you start out at first level and work your way up. I think I managed to get to level 12 or so by the end of that one—just high enough to start getting access to the really powerful spells and equipment.
Last week I purchased the “Hordes of the Underdark” expansion pack, and I must admit it is exceptional. In it, you play a high-level character (mine is currently a 22nd level Wizard) who is “dungeon delving” to solve a mystery. Lots of cool magical items, monsters, and spells (my favorite so far is “Finger of Death”, although the “Dragon Knight” epic spell is pretty slick, too).
It’s been a great way to pass the time when I’m up at 2 in the morning with Katie. I hold her on my lap and feed her with one hand, and with the other I point-and-click my way through the various baddies and beasties of the Underdark of Faerun.