I just started a game of KOTOR. I played for about 45 minutes so far, which was just enough to get through the first (tutorial) mission. So, I can't really say too much about the game yet. Some of the dark side choices seem kind of silly at this point (in that they're so obviously evil). I guess it's kind of hard to judge the dialogue yet, since so far it's mostly been "To get me to open the door, switch me to your party leader using the Black Button."