I prefer no progess indicator of any kind be visible while I'm reading. I may bring it up (manually) on very rare occasions to see how far along I am, but most often, I simply don't want to know how far away I am from the end of anything--chapter, section, or book. I love flying blind. No plot assumptions based on how "thick" the remaining "pages" are on the right side. I wasn't able to achieve that level of blissful ignorance with physical books, so that's just one more thing for the "why I switched to ebooks" column.
