I bought three different rolling chairs and never liked any of them. I sit on a wooden stool to sew, not real comfortable but the best I have found yet. I get up and move often. Sitting too long at a time encourages blood clots to form in the legs. I stand as much as I can. Always stand to press and cut.
I use a folding chair with a thick tie on cushion, easier to stretch my legs out when I use my home computer.