Yeah, Amnesiac is a great example of an album that defines which fans like different aspects of the band. I love this album, but I can see why some people would dislike it. The album takes a road that is not very common. Kid A was a big change for them, but some of the ablum's influence was already seen in other artists, like Aphex Twin, etc. Amnesiac is an evolution of a rock band. And usually when you break schemes is hard to please everyone.