Top 10 would be nice...
Except FFX got above CT. I'm not one of those people who'll reject any list that doesn't have it in the top 10 or any game above it.
I just feel certain games deserve to be above it more than others(if that came out right). Ocarina Of Time I'd find understandable. Final Fantasy X? NO. No I do not. Plus that list was apparantly determined by a bunch of people on that forum getting together and listing their top 5 favorites.
With a poll it's possible for ALL to vote, whether you are a site visitor or not. Vote through the forums? The forum's favorites are going to make the top of the list. It's not going to be as well balanced because rather than focus on all the things the game brought to us and how it's a grand technical achievement for games and the effort put it and such things will be ignored(as they generally do by majority of people). In terms of achievements, CT wipes the floor with FFX.