Ask HN: What chair do you use?

Herman Miller Aeron, one of the better investments I've made.

Steelcase Leap. It is phenomenally better than any other chair I've ever had. (I sit in this chair wayyyyyy too many hours per day and the Leap has kept me uncrippled.)

Herman Miller Celle and SteelCase Leap (in storage). Just learned about the Celle and it's perfect. I recommend both if you have sciatica. You should be able to get both used and in really good condition.