Other for me...
I want to buy all books (that I intend to buy) as e-books. If the e-book price is higher, what I do depends on the book and the e-book format + drm annoyance:
- book that I'm only going to read once => p-book
- pocket sized book => p-book
- book in a format/drm that is not practical => p-book
- book that I intend to keep and whose format/drm is practical => e-book