[fourier]

Yes I do. The reason is moral/aesthetical: to have books on my bookshelfs and organize them makes them always visible in my flat and allows me to easy glimpse over them and have an idea of what I did, what I planned and what I'll deferred. From functional point of view eBooks are more convenient, so if I got a chance I buy both ebook and paper versions, or if I download the eBook for free somewhere I make sure if the book is good to buy the paper version later.