Paper Books versus Electronic Books

I've been thinking about the issue of paper versus electronic books. I know that it's a common thing, but can't help but wonder what's so great about electronic books. Personally, I prefer to have a paper book. Electronic books are like staring at a computer screen for too long and getting a headache afterwards (which, by the way, is the reason I write my books in a notebook before typing them up). Yes, I can say these things because I have tried to read off the kindle and nook and have gotten headaches from them. Even if that weren't true, I would prefer to have a paper book in my hands. I love the smell and feel of the books. That's why it's so frustrating when I try to buy a book that sounds interesting  to me on amazon or other sites that an author sets up for kindle only instead of selling them both ways for the customer to decide. Shouldn't readers' have the option to decide which way they prefer to read?