definitely printed books. storage is a problem, but I stopped hoarding and I'm donating them instead when I finish them and have no reason to keep them anymore, unless I really loved the book. reading on screen for too long gives me a migraine, and e-books I just find awkward. I don't want people to read me things lol
While I love printed books a lot, and love the look of it I think ultimately my favorite is ebooks. I have a tendency to want to read while I'm waiting for things (airports, appointments, waiting for friends etc) so I end up reading a lot not at home, and I have a tiny purse so it's just so much more convenient having an ebook on my phone to pass the time versus figuring out how to lug a print copy. Second place would be audiobooks since I also like listening to books while I'm doing chores around the house or on a walk or something.