Paperback. I’ve sometimes waited for paperback versions of books after their initial hardcover release. Cheaper, lighter, same reading, I used to be less patient so would suck it up and get the hardcover, nowadays I don’t read as much so waiting is easier. I read a lot when traveling and hardcovers are just such a pain. The only “nice” collection I have is LOTR+hobbit.
I’m trying out an eReader soon but I’m not sure I’ll be able to get away from the desire of physically turning pages.