I have friends who are big audio books fans and, despite having a handful, I haven't got around to any. If I had a big car ride I might give them a spin.
So it's still largely physical for me - I have quite a few ebooks on my phone and they come in handy if I am stuck anywhere and I haven't brought a book.
One wall in the living room is just books. The other books are in the studio or in boxes in the basement or attic. And they have been read, some of them several times over. Only exceptions are my wifes' professional books which I haven't read, and my professional ones that she has not read...
And of course there are ebooks, too. Mostly the Project Gutenberg ones, but also bought ones. Or ones I got as reference work for contributing or editing.
I'm a Kindle person myself, due to cost and space issues really. It's just so convient carrying around loads of books on one small device. Especially when in away from home for work.
What I do have though, as my username implies, a lot of books on the making of films. Lovely large format books filled with behind the scenes photos.