DOF - Depth of field, which blurs your vision around whatever you’re looking at
Blur - A complete blurring of the player’s screen.
Motion Blur - Blurs movement. (definitely needs an toggle in graphics settings to disable 
)
Letterboxing - Puts cinematic black bars on top and bottom (or sides!) of screen.
No idea why anyone would want a total blur but I’m all for more options, so sure, why not?
Explosion discombobulation? Losing conciousness? Underwater? Lost your glasses? It’s not like it would just be a toggle, you could set the intensity with a slider like the current ones. There’s also I/O FadeIn/FadeOut so you can make transitions with them.
Ah, yeah, didn’t think about scenarios like that. Those all make sense (except making for losing your glasses, that’s a bit weird lol)
Would also love a “scanlines” style effect or, stronger TV Static!!
I was thinking of the scrapped idea with Mr. Friendly in Half-Life, where getting hit by the creature would knock Gordon’s glasses off. From what I remember they couldn’t get the blur to work back in 1998.
Wow. That’s actually really funny. Now I really want someone to mod that into the game. lol
Still thinking about these post processing effects
I’m honestly all for additional post processing options, they’re pretty fun to mess with (: Depth of field and Letterboxing ones would be so useful.