Best use for a Kindle: Reading Big Books, Series Books and Free Classics

I really like to read big books like Infinite Jest or Moby Dick on the Kindle.  This way I have no idea how much the book actually weighs when I carry it around.  Sure I have to read it for what seems like forever (which is counterintuitive, because the kindle is so thin), although when I finish I don't have a trophy to put on my shelf, all I have to do is return to the menu to pick out another book and keep the reading going.  (it's also great for series books.  Finishing Book 6 of Dune and instantly starting Book 7 was quite a cool way to go.  Also a big fan of the free classics.)