In over three decades of spending anywhere from 6-12 hours a day at a desk, in several corporate environments, all equipped with commercial grade chairs from Haworth, Herman-Miller, Steelcase, and some of the cheap discount office supply store chairs, my two favorite chairs were Herman-Miller's Aeron and the Haworth Fern - The latter is my overall favorite, especially in cooler offices and data centers, as the cushion and fabric helps keep my body a little warmer, but not so much that I feel hot in warmer offices.
The real game changer for me with this chair over any of the dozen or so other commercial grade chairs I have used for several months or years, is the flexibility of the back as I move throughout the day.
Now that I am retired, yet still sit at a desk several hours a day, now doing 3D design and graphics, I decided to splurge buy my favorite desk chair, upgrading to the Digital Knit fabric (which I had never experienced before - it's REALLY nice and plush) in Lagoon. I also upgraded to the aluminum base, but opted to forego the Lumbar support and 4D arms, neither of which did I need before. I briefly considered getting the headrest, but as I never had one before, and never felt like I was missing anything, I opted against it as well.
I have a massive, high end sit-stand desk, a 49" super-ultrawide 32:9 display, high end PC, and everything else. Scrimping on the chair would have been silly, so I got the best!
