I grabbed a nice old leather office chair a neighbor threw out. Its got holes in it and a bad spring in the bottom. As long as I'm careful, its quiet (but if I lean too far forward that spring goes 'BOING!'. Its super comfy. This is in a ground blind.

The tower I'm looking at for next season has built in chairs but if you already have something.....Alot depends on the style of blind. Are you in an elevated shoot house with small openings? Are you up in an 'observation' type stand where you'd benefit from something that allowed you to move more freely?

Old office chairs are great but can be noisy. Carpet works wonders, though.