I played Ratchet and Clank: A Rift Apart recently because it was available free on PS+ and it is the most gorgeous game I have ever played in my life.

The graphical capabilities are astounding, the aesthetic is pleasing, and there is charm out the wazoo. You can't look anywhere without seeing something interesting making use of all that fancy graphic tech. I kept it installed despite 100%ing it just to mess around with the photo mode.