The poll could use a bit more built-in intelligence. It is for example no problem to vote for the same game twice as no. 1 and no. 2 (yes I tried that earlier today when I was bored at work ). The poll should return something like "Sorry but you have already voted for that game as your no. 1 choice - please select a different game or 'none' ".

Other than that I also liked the 'none' option a lot .