I like physical copies of books and digital versions.
Digital brings forth a lot of convenience for me, including saving space at home, saving money, and it's portability(I read via my phone.)
I've never had an interest in Audio books though, as I take a lot of pleasure in reading things with my own idea of the sounds of characters voices or the tone of the narrator. So often times, audio books don't sound how I would have expected them to sound.