I usually prefer digital books for a lot of reasons, they're convenient to bring with me places & I can change my mind about what I will read; I don't get wrist pain from holding the book open; I can read in the dark with just the ereader's backlight on; I have control over font & font size, so I don't have to get used to differences every book I read; there's no chance of papercuts; you can use ctrl+F.

The downsides of ebooks are that I can't write in margins (if it's nonfiction, I would never write in a fiction book), and the ereader chassis conducts heat better than paper so it's extremely cold at first in the winter. Also footnotes are annoying as shit compared to footnotes in paper media, and tabbing back to a known earlier page (e.g. a map for fantasy novels) is worse UX than in a physical book.

Cost aside, ebooks win almost always, although sometimes I'll buy a nice edition of a book I love to decorate my bookshelf, and when I read paper books I enjoy the things they're better at than ebooks.

(And of course there's audiobooks, where physical media makes little sense)

I don't want to have to deal with reselling books... Plus I'm a hoarder so I really don't want to tempt fate and accumulate physical things I don't need.