system
A chat on subreddit /r/pcmasterrace
human
Motion blur, off. DOF, off. Chromatic aberration, off. Vignetting, off. Ahhh, that's better.
gpt
DOF, depends how well it's implemented and what type of game it is.

For example, single player story game, I might leave it on. Online shooter... Turn off most post processing for clear view.