I like NVIDIA, although one of my computers has a 9800 for Half-Life 2. I like both and they both have their strengths, but I'm just a fan of the Geforce myself.
As long as it stays a poll and tech discussion about the brands I will let it fly. BUT if it does turn in to a flame war it will be locked.
By the way I have use Nvidia ever since they came on the market. I have tried ATI but had so much trouble getting drivers to play nice I tossed it in the closet.