I read 2-3 books a week so I vastly prefer digital.
Most of my reading is done at the gym - a lot easier to read the Kindle App on the iPhone or iPad while running than a physical book.
I read a few pages here and there during walks between buildings on campus (or during boring meetings

). With a physical book, it's back at my desk or worse, at home.
I respect the book as a fetishistic art object and I love the hundreds I have at home, and I still trawl used bookstores for cool out-of-print finds. But if a book is available digitally? GET ON MAH KINDLE.