I love reading books on my phone, so I suppose that makes me a "neither" kind of person.
I don't need epaper, the display on my phone is absolutely amazing, text is sharper than is possible on print. And I don't depend on light for reading, the phone adjusts the brightness of the screen to be suitable in a dark room too.
The convenience of using my phone is unmatched by either e-readers or physical books.
Using an e-book format also makes it possible to easily look up things as you read. And of course it makes it possible to search the book.

Using e-book on a standard mobile device (not a specific e-book reader) also allows you to subscribe to book services similar to Spotify for music. That way you always have access to new books.

Paper books are vastly inferior IMO. They are heavy, and they are cumbersome when you read in bed, they require lighting suitable for reading, and they have no search options, and they also smell.

PS:
All my e-books are without DRM, to me DRM is not an option. So if a book isn't available without DRM, I simply don't read that book. Needless to say I don't use stores/services like Amazon that IMO are completely fucked up.

PPS:
My sister suffer from near chronic migraines, and because of that she prefer paper books. So different strokes for different people.