I've never thought of investing in a gaming chair but I wouldn't know where to store it anyway. It would just sit in the middle of the floor and be a trip hazard when I wasn't using it. Anyway, I'm use to sitting on the couch or the recliner or whatever other furniture that is in the room when I'm gaming.
used to have one, then it got really uncomfortable, sold it to a friend still in good condition instead. Entirely up to the individual, on how long you are planning on sitting.