Get the physical copies. After reading it, you could use it to flex or to fill up a bookshelf.

Exactly ^

The first time I read The Rise of Kyoshi I listened to the audiobook. I then proceeded to read The Shadow of Kyoshi on ebook. I eventually was gifted the box set (the one that has the extra annotated scene) and since then I’ve read them physically.

I think reading physically is the best way. The audiobook is really solid though (I now know how to pronounce the names correctly).

I think it depends on the reader (or listener). There is no one best way, it's subjective, and each person may have a different preference. I first listened to them on audio, then I bought the books, so I'm kinda torn between the two.

Physical copies are always, every time, superior.

Physical copies are superior than digital, to be honest.

Always physical books. I just prefer them so much.

Plus, I have a large bookshelf and I'm planning on filling it with all my favourite books (currently collecting the graphic novels :) ).