What PC gaming quirk do you have that you believe 99% of other PC gamers DON'T have?

My quirk is playing on a custom 21:9 resolution within a physical 16:9 display.

I own a 2560x1440 display, but I prefer to game on a custom resolution of 2560x1080 (21:9 ratio) if the game supports it. I created this custom resolution via Nvidia control panel, and just have black bars on the top and bottom.

I have no evidence that 99% of others don't do this, but I suspect this is likely rare.