i agree, everything, every moment in kotor2 makes you feel an emotion, the music - the sad history of the characters, the impact and infulence you can bestow upon your party members, going down the path of the darkside must have made you feel like anakin, killing and killing and going so far down the darkside you cant stop.
kreia mentions that your a natural born leader and that she is not, maybe shes stickign with you so that when you become darkness itself (from her manipulating) that then she can take over or something, (similar to the palpatine effect)