I’ve met people unwilling to touch a Kindle or Kobo unless there is no paper book left on this planet (no tree left standing). They just love that feeling of paper. There is environmental destruction involved in fabricating an eReader and maintain a website to sell eBooks too. No point in going into an endless discussion about this.
I also met people that ditched the paper completely for the obvious advantage of carrying hundreds of books in your pocket and the ubiquitous potential of buying a book from anywhere as soon as is published.
I remember being in vacation in Lefkada, sitting in a tavern, watching the sea and Skorpios Island in the distance, on 17 August 2013, while hitting the refresh button every five minutes so I can be one of the first to buy Dust by Hugh Howey. Lately I buy books on paper only if I can buy it from the author at a book launch, as I did with the last book written by Salman Rushdie, or if is something that really moves me like B by Sarah Kay.
Kindle is as a tool, the easiest way to buy books. I think sometimes about buying a Kobo or a Nook, but it seems to me that I will limit my choices. To use anything but a Kindle is for me a decision based on a tradeoff between the efficiency of a Kindle and the beauty of being part of the Kobo community.
Reading a book is reading a book, no matter the support on which is written. If I have to make a choice about what is important for me, I will not ponder about what eReader to use. The only thing that matter is the act of reading.