First, I'm assuming you are talking about TTRPGs and not video games.
I don't like kitchen chairs or other chairs not designed for long periods of sitting.
I bought a bunch of office chairs through Craigslist when a local business was downsizing. That's also how I got a big, heavy conference table for my gaming area. Office chairs have advantages over other furniture when it comes to tabletop gaming:
1. They are designed for long periods of use at a desk or table and are more ergonomic.
2. They are height adjustable. That's not important for a chair for lounging or sitting back to watch TV and is not so important for a dinning room, but when you have a gaming table where people need to look at maps, papers, and other items displayed on the table, you will want it at a comfortable height.
3. Wheels. Being able to easily move the chairs around is nice. Makes it easy to scoot over during a battle scene, or scoot forward to let someone buy if space gets tight, and make it a bit easier to get up from and down in.
Some things that I look for in TTRPG chair that differs a bit from a computer or other "work" chair. When sitting at a computer to work, I don't want arms on my chair. They feel in the way. But I appreciate them at a game. It is just more comfortable to sit back comfortably without having to put your elbows on the table. I might go a bit smaller. The chairs I have a decent sized with a full back, but they are not huge executive chairs. Perhaps if I had more space and a huge table, but for most set ups, really large chairs are not practical.
An easy to overlook option is that many office chairs have a rocking-lock lever to allow or prevent it from leaning back. Some people want to learn back in their chairs. Some hate it when the chair tilts backwards when they lean back. I sometimes like it one way and other time the other. It is nice to have a way to set the tilting behavior.
There are, however, some downsides to office chairs.
The biggest is that they don't stack. Previously, I used nice folding chairs. They had a nice padding and comfortable back, but they folded up and could be stacked. Office chairs work best when you have a dedicated gaming space.
My gaming space doubles as a craft space and work area that we use for everything from school projects, making cardboard camp weapons, painting miniatures, or putting a foosball or air hockey top up. So the chairs are always there and it works well. There are times however, when I'll like to clear out some or all of the chairs for some project and there is no convenient location to roll them to. Also, they are heavy. If I need more seating up stairs, I need to break out the folding chairs. I'm getting too old to be risking my neck lugging heavy office chairs up and down the stairs.
One other problem is that they are harder to clean. Most fold up chairs are made for banquets, etc., and are designed to be easy to clean. Dining room chairs tend to be all wood for the same reason. Office chairs can look pretty bad, especially if you buy cheap ones. Make sure to get chairs with durable and easy to clean fabrics and patterns that will allow a small stain to kind blend in and disappear in the patterns.
Here is a picture of the chairs I'm using now:
