The first one had a much better classic story, and much better characters. Mission, Carth, Bastila, Zalbaar, all better characters then any in Kotor 2. Plus you didn't have kreia talking to you every few steps for two hours(although she was interesting it was like alright I got the point already). The planets are better and the revan - malak saga is more interesting to me then the fallen jedi storyline. That said I still love both games, but kotor will go down as a classic while the second one wasn't as good, not really in the same league.