9. BiGals
The BiGals defends a particular product under any circumstances, no matter what the scenario. He is fervently aware that the Hummer was an excellent hummer as long you avoided driving it. He also assumes that anyone who fails to praise said product to the skies must be engaged in an irrational vendetta against it -- in effect, he sees everyone who isn't a BiGals as an Anti-BiGals.
The most common BiGals tendency is to worship either something (or everything) GM-related or something (or everything) Chevy-related. One unmistakable sign that you're dealing with a BiGals of this kind -- and not with just an enthusiast -- is that, even though the object of his veneration is ultimately a product for sale, he somehow manages to subordinate technological and monetary considerations to moral imperatives.