Refresh rate

60HZ but I'd love to upgrade to 120 down the road. I believe high is generally better but the monitors cost 300-400 USD for a decent one.

75Hz because it's my monitor's highest, the quality is definately better and my eyes don't hurt. I'd also like to upgrade to 120Hz :P

I use 75 because it looks a little smoother than 60. I also want to experience someday kz on a 120Hz display.

the ideal thing is hz=fps

100hz-monitor
100fps in game
multiple of hz in pollingrate mouse (500hz or 1000hz ejm)
multiple of hz in rate keyboard (1000hz)

for more smooth

I bought a 120hz monitor a few weeks ago. I Love it. No tearing shit anymore. Just smooth Gaming.