I also re-read books despite knowing how everything ends. Do people who don't like spoilers not re-read books?
I know this is true for me. The only books that I have read twice were the Harry Potter books, because there was just so much to take in and the second time around I read it with someone else who hadn't read it before. But besides that, I never re-read books, it just feels pointless since I already know what happens. I also rarely re-watch movies or TV shows. Saves on buying DVDs!