physical book, audiobook, ebook on phone or ebook on ereader?

Which do you personally prefer and why, even if you don't consider yourself a 'reader'

I do not read a lot, but I have read more this year than the previous years (~5 books), and so far I consider myself to have no particular preference in terms of physical or ebook on phone because I thin the pros and cons of both even out. I have been considering an ereader, mainly to save space and because I have heard that having dedicated devices can be better for focus than, for example, one device that does everything because it can distract you more. Also e-ink is apparently good for your eyes.