I just finished an ebook this evening. My next book is only available as a paper book. Of the last five books I have read (including the one just finished) three have been paper and two ebooks. The number one by far criteria for me is what book do I want to read. That normally decides the ebook or paper question right there. If both formats are available then issue of cost (if the book is available in my local library I will read that) takes priority.