The Dark Side dialoge options should be more subtle, making an evil deed look more more appealing and not so overtly evil looking. The way to getting Dark side points in KOTOR was obvious, forcing people to hand their credits over, simply killing them or by using Force Dominate Mind to allow you to pass. Quests that are seemingly good could actually be a trick of the Dark side. Also dark side characters within the party could entice the player to fall to the Dark Side eg. Canderous, HK-47. I think Obsidian should be careful to portray the fact that good and evil don't always come clearly labled at first glance.