Sometimes I also find it a bonus that you really can't do anything else on the device than read. Focus on the text with zero distractions...

Absolutely. When I first got mine my friend was shocked that I could be so enthusiastic about a device that doesn't have social apps and integration or notifications.

Like what you'd want when you're concentrating on a book is constant reminders of what's happening on Facebook.

I bought a Galaxy Note since my main reading time is either spent in the dark or grabbed in small gaps of time when I'm on the move. And since it's AMOLED it's not technically back-light and gray on black text works very well for me.

I was to cheap for that when I bought my kindle, but try a search on Amazon for "lighted kindle covers" http://amzn.to/Rn9obC