One thing I actually enjoy in many modern shooters is the iron sights mechanic. Even if it doesn't change much, it just feels so cool to have an extra step when aiming, and I miss that in older games. I grew up on Doom, Blood and DN3D but aiming down your gun is just rad as hell

And also, no shooter has ever surpassed Stalker Call of Pripyat for me. That was literally the best FPS I've ever played