I've become more political in my reading habits since I purchased a reader, as in my actions are now no longer based solely upon 'wanting' to read, but on supporting that which is fair, honest and what is attuned to my own beliefs about digital freedom. I no longer support any system or author that has DRM or geographic restrictions near their work. I now read a lot more classics that are available in the Public Domain, and a lot of new and experimental authors who release their works under the Creative Commons license.
It has definitively changed my reading habits, and all for the better.