I've seen a lot of so-called "gaming" chairs and they looked tacky, slim/thin, and uncomfortable. So... I bought an office chair and it was way better of a purchase and very comfy.
That being said, you can't go with any office chair either, you'd need to make sure it's adequate to your needs.
That being said, you can't go with any office chair either, you'd need to make sure it's adequate to your needs.