Depends if it's night or day. In the day, I'm okay with a print book. At night, I'd much rather have the light off and use an e-reader, it's easier on my eyes and helps me go to sleep faster. Also, falling asleep reading doesn't lose my page.
I have a collection of about 2000 paperbacks, mostly, largely science fiction and fantasy. These days I mostly buy e-books, because I don't have space for more physical books. I can't afford more bookshelves, nor do I have the open wallspace to install them against.