I put ten to twenty just because I didn't want to think too long on if I had more than twenty currently. I get a lot of physical copies as gifts as it is easier to tell family members to get a box with the game's name on it then just a steam gift card.
But that being said, the last physical game I got was the new call of Duty. That thing was five disc's with no instruction manual at all, not even safety information like most of them have been lately. Oh, and of those five discs, I only had to use the first one that took me to the steam page and started a digital download/update. The time of physical cases seems dead and buried now. --- Pokemon X FC: 5112-4708-5286 (Frogadier, Quagsire, and Panpour friend safari)
Worms 2 Worms Armageddon Civ II Civ III Civ IV CM 01/02 FM 08 FM12 Farenheit Settlers 7 (I think, never really played it came free with the below 2 in a Game promotion for some reason. It's definitely a Settlers game though.) Dreamfall The Longest Journey Chaos League Chaos League Sudden Death TimeShock Fallout Fallout 2 Fallout Tactics Myst Myst 2 Myst 3 Myst 4 Myst 5 Grim Fandango Sam & Max Hit The Road The Dig Discworld