The thing that really bugged me most in KotOR was the ending. Up until there Bioware had made a game with an incredible story that had everything to get near if not surpass Fallout, Planescape and Baldurs Gate as one of the top RPGs ever, I mean the scene with Revan and Malak in the Leviathan has to be one of the greatest moments in games ever. But then they blew it by having an incredbly dissapointing ending, after all the build up the tough battles in the last level and the great last battle all you get is a 30 secs cutscene that doesn't add anything. The dark side ending at least had the feel of being the new ruler of the galaxie but the light side has to be one of the worst endings in a game I have played. Nothing was explained, "what happened to you?", "what happened to your party members?", "what happened with the romance between you and Bastila/Carth?", "how the worlds you have passed changed?" it was all left open.
The game just screamed for an ending similar to Fallout, each planet had a bigger quest that could be solved in at least 2 ways and lots of subquests, wich means you could have different endings for each planet. Fallout 1/2 had the best endings in a game I have played because of the way they showed hou YOU affected the world, its cities and people. From what I have read the team is really trying to make the game an incredible experience, and no experience is truly incredible if it ends in an "ok" way. So it does't matter how much better the interface is, how much better the game looks, what really matters is the story as it is the core of the experience, and by making what is really the worst part of the game and making it into a memorable one, is what differentiates a great game like KotOR was from the true classics like Fallout and Planescape...