o Robust - You don't mind breaking kindles?
o Ability to loan to others - You never lend books? To anyone?
o Extended Read Time - How on earth couldn't you want extended battery life. It drives me crazy to go on vacation and have a fully charged kindle run out of battery. I would kill for a solid 100 hour battery life.
o Random Access - You never want to flick through a book? (Admittedly, the K3 has the +/- chapter view, which is good, but not as good as being able to flick back and forth in a real book - particularly textbooks or a complex Game of Thrones reading)
o Support for color - Really? You don't want any color in your books? Not even Text books?
With the possible exception of "Loan to others" - I can't understand why every single one of those isn't a "Must have" in order for the kindle to be as good as a paper book for everyone. Also, and not coincidentally, they also make for a better eBook experience as well.
I would love to switch to "eBook Only" (I've purchased about 200 books so far for my kindles over the last several years) - but, for some things, I continue to purchase paper books.