1) Give me back my physical pageturn buttons that I can tap without moving my fingers! Why, Amazon, why?
2) Make the LED whiter, maybe even yellower, instead of bluish. I'm not a color expert, I just know that this color looks wrong.
3) I'm not sure what's up with the font, but pick a font that doesn't look fragile, like some parts of thinner connectors are half-not-there.
My wife loves her Kindle but when we're reading in bed together the sound of her clicking the button drives me up the wall. She likes that she can use a larger font so she doesn't need glasses, but that just means way more clicks-per-minute. I think she's pressed the button so many times it's worn out a bit because it makes a very distinct 'click'. After a while each one is like a gun shot in my ear.
But if it wasn't blue, it wouldn't suppress your melatonin secretion and make you stay up all night reading and buy more books!
2) If I zoom into text I don't want to have to horizontally scroll, that's even more annoying that small text.
I read a book in the computer, and I read it scrolling down. It didn't feel fulfilling. It was like reading a web-page.
But having read a couple of books in my phone (with the kindle app) it felt natural again, I enjoyed much more the books that way.
And no, the quality of the book was not the question. It was a free download (by the publisher) and a year or so later I've bought it on paper and read it again. It was much more fulfilling this way.
Perhaps in half a generation or so people will feel more natural going down than sideways, right now I prefer the later.