I love my kindle, but I really miss one thing from paper books - the cover.
When you have a paper book whenever you pick it up you see the title and the author and the cover image. I find I still remember these from books I read long ago.
However on the Kindle you only see the cover of the book you are reading if you make an effort to scroll to the start of the book - by default the kindle starts you at the first bit of text.
Kindles also don't show author and title on each page like (some) paper books do.
I find I can read a Kindle book then have no idea who the author is or what the title of the book I've just read was.
I'd really like it if the Kindle (as an option as it wouldn't suit everyone) showed the book cover of the book you are reading when it is off. Then when you come to pick the kindle up and turn it on you see the cover, title and author.
That tiny change would really improve the reading experience for me.