I started off with a gaming chair pl6800 vertagear that fell apart pretty fast and was abusing my body for a year. (metal jabbing, foam sinking, etc.)
Swapped to a Knoll Generation (renewed for 300 from officelogixshop with issues, they definitely arent remanufactued, seems like they buy them used and clean the main bits to make them look like new) Its pretty amazing as someone who fidgets a lot, being able to stretch with my arms back is insanely comforting because the bucket seat was making me a hunchback. This chair specifically was the best move going from a gaming chair because the back bends, its like the exact opposite of a gaming chair.
It is used and definitely feels off, they sent me a replacement and told me to donate the first one (height adjustment didnt work, new one creaks) But even then its a massive improvement over the gaming chair that was supposedly made for big ppl. (im 240 5’10) The seat while thin is suprisingly comfortable for 8 hours of use daily and I can sit with one leg over the other. I might buy a cushion tho. This was my first “real” chair purchase and its suprisingly decent not being a steelcase amia/leap (havent tried both but its all anyone on reddit talks about)
I’ve been using an Ikea Henriksdal (chair for dining table) for a few years. Recently, my partner needed a new chair and had a choice between a HM Aeron or Sayl. We decided to get both and we’d then each pick the one we prefer after using them for a while. I’m on the Sayl now, but I think I actually prefer the old Henriksdal. It’s so much more spacious and lets you comfortably sit in a bunch of different positions. Both HM chairs confine you to a “proper” sitting position.