When I started working at home due to COVID, I decided to buy a new chair. I was tired of having shitty chairs with "genuine leather" (aka leather spray paint) that would peel off over time. So I looked into chairs and landed on a nice gaming chair. Sure, it's ugly, but it's gotta be comfy right? Nope. Sitting in this thing for hours at a time has quite literally translated into a pain in my ass. I had to eventually get a seat cushion to sit on, because it was killing me otherwise.
In hindsight, I should have just gone with a traditional office chair.