When I bought my basic Nook e-reader, it was cheaper than the Kindle, although I don't recall how much cheaper. There seemed to be more Kindles around at the time, and that's what I would have purchased; then a friend gave me a heads-up: With Nook, you could get books from the library. Not so with Kindle.
Since I don't have a lot of resources for book-buying, that did it for me. I wanted to be able to read library books on my reader. I have read a lot of library books since I bought the Nook.
Now I see that the Kindle can finally be used to check out library books.
Here's the real deal-breaker: You can buy the basic Kindle for $79.
The cheapest Nook is $139.
If I were buying an e-reader today, guess which one I'd go for?
It's nice to know that if something ever goes wrong with my Nook, I can buy a Kindle for under $100.