LOL...look at the voting for Civilization. How on earth did so many people vote that it shouldnt be on this list???
To tigershark: I think the genius of KOTOR was, unlike say the Mass Effect series, you could go completely evil and actually have it affect the ending absolutely. Oh, and the awesome storyline (I truly did not see the character twist coming until very close to the reveal) Yeah, you can be a renegade in the ME trilogy, but it really only has one total ending whether you are bad or good. Contrast that to the KOTOR endgame, along with how your crew interacts with you as you go evil, whereas for Mass Effect, no matter how renegade I got, nothing really changes in how you approach the endgame, IIRC.
As for character movement, you have to compare it to the games of its time. For example, I dont think movement was much worse than say, Morrowind, although you didnt have freedom of up/down look, which MW did. Obviously, later games like Jade Empire, DAO and the ME trilogy were much better in that respect, but they also came out much later.
Dont get me wrong, I love the ME trilogy. Just pointing out the greatness of KOTOR.