I got a Nook in 2011 and it was my main reader device until it died a few months ago. I replaced it with a Kobo and I'm quite happy. Having backlight is a huge improvement.
I don't typically give up. I mostly read non-fiction, so I always wait to see if there's something for me past page 200.
I gave up on "Foucault's Pendulum". I started it as a teenager and obviously it was way above my league. I still want to pick it up again at some point in the future.
I also passed on "Postmodernism, or, the Cultural Logic of Late Capitalism", because I couldn't even understand the introduction.
I created my account in Spain around 2009, moved to Canada in 2014 and came back to Spain late last year. Never had a problem with this :-?