Selecting a PC gaming chair
When typing and working at the computer, you need more upright support so that you can maintain neutral spine posture and let the chair support you. But for gaming, you may want to recline a little bit to relax your lower back, while still having good support in that position. So a locking backrest and/or some sort of tension control is important.
With an adjustable sliding seat, tall people can get more support behind their legs, and for shorter gamers it can be set shallower so they can sit all the way back in the chair.
For those willing to stretch even farther out of their comfort zone, a relic from the 70s has returned with a vengeance: the Beanbag. Admittedly, it has no speakers, no RCA inputs, and no headrests or lumbar support, per se. But there are an increasing number of gamers who swear by them.
Gaming chairs for PC are available for varying budgets from entry level to high end.