A loyal fanbase is the motherlode of any writer or producer of fiction. But it has side effects. One of them is the tendency of a given fandom to bash another. But this is more than just Fandom Rivalry. Fans of a given work have a unique ability to recognize all the failings of a rival franchise, and yet completely miss that their favorite franchise is guilty of many of the same shortcomings. This also works the other way around: Sometimes fans will hold up a work as a masterpiece, and miss the fact that many of their favorite franchise's qualities are present in other works.