Refresh rate is king. I would much rather use a 1080p 120+Hz monitor over 4k 60Hz. 1440p 144Hz is the sweet spot though, big visual improvement over 1080p without the need to bankrupt yourself on a GPU powerful enough to drive a 4k 120Hz display or relying on upscaling making everything a blurry mess.
The eye opening moment is when one of these threads touches on a subject you know a lot about and the top upvoted comment is spouting complete bullshit. See it once and you start to doubt the credibility of every other highly upvoted comment that looks legit but could be just as wrong, you simply don’t know enough to immediately disprove it.