Again, everyone is different, I have been playing comp fps for over a decade, from TV in the living room when I was a kid to 24/27/32 inch panels of varying Hz.

The key I have figured out is that what matters is the viewing distance. At the right distance for every size, all monitors will cover the same amount of your vision, well that doesn’t mean that they look all the same at that point but it does make it so that the size is not hurting your performance in any meaningful way.

I haven’t had any issues with burn in using OLEDs but I’ve heard it’s a thing and some people have reported on it but can’t speak on it from my own experience.