I can't help it. I love the feel of the paper in my hands. The fact that it is a physical act to turn the page. I also am frequently doing research in which case I will have three or four books open, at the same time, comparing passages and making notes (on my laptop or phone).
I am not averse to the e-format, I read frequently on a screen; it is just not preferred. All things being equal I also prefer the hardcover though I must admit the paperbacks are much more convenient for casual reading.