Physical media all the way unless digital is literally my only option. Softcover, hardcover, I'm not terribly picky either way, though I buy softcover because it's either my only option, or even when I have other optons, it's usually cheaper.
Though I might decide to go harcover for certain volumes of a series I'd like to read because some of the old hardcover editions are slighly cheaper while containing the same amount of content as the current softcover editions.
So really, I can go either way. Not picky, but I'll go with whatever is friendlier to my wallet.