I'm the opposite. I like technical books on paper, and I often print out RFCs I actively use. On the other hand, I think e-books are amazing for novels. They usually don't feature pictures, equations, tables or other weird stuff, and e-book readers are super-convenient for commute.
I don't want piles of dead trees with outdated information taking up space.
Plus with ebooks I find right away the information I am looking for.
For other types of books, yes paper rules.