In the KOTOR sieries I felt that KOTOR2 had too many villians. I mean think about it, the player took down 3 Sith Lords, 2 in about an hour. Now, I thought that Malak in KOTOR1 was much more enjoyable to take down because of the build up throughout the game. By the end of K1 I felt like I wanted to kill him. So I guess I liked Malak the best in the KOTOR sieries but in all of StarWars, I think it had to be Vader.