For me, anything 25 FPS or higher is 100% fine and I’ll be enjoying my time. I never play competitive online shooter games ever, though. All single player ones like GOW and the likes. I game on a 60 Hz 4k monitor. GPU is AMD RX 6600 alongside Ryzen 7 5700G and 32GB RAM. My games are set to meduim most of the time at 4k. Demanding titles are on low. Surprisingly, GOW and GOW Ragnarok are both set to ultra and I still get around 40ish FPS.
My target is 60, but depending on the game I find framerates down to 20 technically playable (if it’s stable), but I need a bit of time to get used to it.
For framerates above 60, however, I can’t really feel any difference so I usually set a cap at 60 to reduce heat and because the on board sound card is poorly isolated and picks up noise from the gpu.