No, I wouldn't consider myself a total purist. I do very much prefer the slow, mindless zombies that aren't created through magic, but there are still books and movies that I enjoy though they don't fulfill all my ideal requirements, like Plague of the Dead and the remake of Dawn of the Dead.
I guess it depends on how it's all presented and whether there are multiple things I'm not a fan of, so I don't really mind the living carriers or the fast zombies in Plague and Dawn, because the rest of the story is really entertaining.
Monster Island is probably the book that has the most of the things I don't particularly like, and still manages to be a book I like and recommend. There are only two cases of zombie animals, the thinking zombies are only a few, and I think that it was actually pretty well done overall, and I guess the supernatural part was a bit much though, but still a great book.
It would probably also become somewhat monotonous if I only read books about the same kind of zombies, over and over again, so I don't mind a bit of variety. Brian Keene's books just haven't really got me interested yet, mainly because of the thinking, possessed zombies, but I might give them a try some day.