I like to have something actually physical when I make a game purchase, I couldn't care less if it's just a piece of plastic. I like to display my games as part of a collection, when downloaded it's just an icon on my screen. I buy everything physical unless it's a digital only game.
It's an icon on your screen regardless, as the entire thing is installed to your hard drive anyway. The only difference is you're inconveniencing yourself by having to have the disc in the drive.
I'm not trying to give you a hard time or anything, I'm just genuinely curious.
Also, I'm interested in how many console gens you've been gaming. I've done the "collection" thing every generation going back to the Atari 5200, and invariably I have pounds of plastic to deal with as generations come and go. If I kept every game I ever bought and didn't sell right away, I'd need to rent a storage locker to keep it all in.
This gen, I've decided I'm going to go digital for a game I'm going to own for longer than a few months, and physical for shorter games I'm going to sell after completing.
That said, I could kick myself for getting a physical copy of Diablo 3. I really should have bought that one digitally.