Fallout 2 is exponentially better than the first Fallout. If you liked the idea behind the game, but had a dislike for a minor aspect of how the game was made, Fallout 2 will be one of the greatest games you'll play.
Edit: I meant a dislike for something in the first Fallout.
I'm also going to recommend Neverwinter Nights. Great game. oh, and I hear Morrowwind is good.