Do you prefer hardcover, softcover, or electronic books? What are the benefits of your preference?
In truth it sorta depends on the game. I love my softcover old-school books, my hardcover books and my PDFs. In general, I do like physical books, but I also love the convenience of PDFs.
I have put my PDFs on various cloud systems I have access too so being able to get to my collection at anytime is great.