Despite the technical glitches in the gameplay and control KOTOR I had a good story and decent characters and you didn't see the plot twist coming (be honest now, it you hadn't had it spoiled you didn't see it coming) and the different planets were all varied and nice to look at given the time it was made. Remember 2D isometric was still the standard at the time.
KOTR II was the same except for the story. I was hooked, I was really into the story and I loved the premise and how you teased the backstory out in conversations. And of course it all fell apart. Cut scenes that made no sense, all these incredible villains whose story wrapped up in a way that leaves you say "that's it?" A short exposition with an antagonist that has absolutely no reason to tell you squat to tie up the story? It was 3/4 of a great game.
Of course the story of what happened with KOTOR II is well known and no need to reopen old wounds by bringing it up again. Had Obsidian been able to make the game they wanted to make it would have been one we would be talking about for years to come (only in a good way). Instead it's... well it is just what it is.
Just my $.02