Planescape: Torment made me slow down and realize a game can be an entire world onto itself and I shouldn’t skim over stuff I read.
The Outer Wilds is probably the most recent game that changed how I approach stuff. It’s so good. Nothing is given to you, you have to figure out everything on your own. It’s good for developing patience and curiosity.
For twitchy gameplay type stuff, I recommend Radiant Silvergun. Makes every other shmup feel like they’re in slow motion. That game is why I was able to beat any of the Touhou games.