It looked good and the fact that you could set different AI:s on the computer was fun. It made it a lot more interactive and I must say that the style of this Tic Tac Toe game was high.
No large filesize, just a perfectly good game to entertain yourself with for a little while.
Oh, I gave you some points for humor for the comments on the computer's AI.
Anyways, keep up the good work!