Here's a couple more things about the Kindle that I wouldn't have guessed before I started using it.
#1: In the past, I'd go to the bookstore and buy several books at a time. Naturally I meant to read all of them, and just as naturally, I didn't. Another book would catch my eye before I'd finished them all, a review book would come in the mail, I'd get a few books for Christmas, etc. etc. The upshot is that some of the books would fall to the bottom of the pile and never get read.
With the Kindle, though, there's no pile. When I finish a book, all I have to do is decide at that moment
what I feel like reading next. Ten minutes later I have it. I don't know for sure if this is good or bad in the long run, but it's certainly different.
#2: I have a floater in my right eye that can get pretty annoying when I read. However, I only really see it against a bright white background. Today my floater was in high gear, but I noticed that it wasn't bothering me while I was reading because the background of the Kindle is a soft gray. When I first got it, that soft gray annoyed me, but now I see that it was a blessing in disguise