Unpredictable NPCs. It's odd if you're playing the Dark Side and you go about killing innocent people that you're lightside companions just sit there and say "Why!". They should be obliged to attack you there and then not at the end of the game. It would be interesting if NPCs actually tried to betray you or something. Perhaps some will leave your party for personal reasons or others will die defending you or something. Influence should also play a large role in whether or not companions will betray, defect to another cause/alignment, leave, die or remain loayal to you as well. {Quote from Terranova}
I really like the idea of having party members really act like real people would.
However you would have to keep like two party members; otherwise if you were darkside and had almost no influence with everyone you would end up killing off all your party members with no one left to talk to or help you. <_<
KotorIII would also have to have many characters that could join your party since a couple might die an unfortunate death I actually would like that because you could fit alot of characters from kotor1 and kotor2.