When you are gaming you will be surprised that you cannot achieve your best in either a casual or a competitive setting by just working on your skills and strategies of play alone, you will have to work on getting the right gear that is ergonomically fit for you and your use. The comfort of the player is a highly underrated aspect of getting the best out of your gaming; if you game seriously or if you are trying to game at a pro level or even a semi pro level you will know that when you are comfortable you will be at your best. When an intense or extremely competitive match is going on then you will find every moment of discomfort something that worked against you and prevented you from being able to pull your best play, and that can be due to the chair you sit on while you game. The chair your use while gaming is a very important part of how you play and you will find that once you have a chair which fits you like a glove then you will feel even better when you game and you will not have to worry at all about the adjustments of the chair or the settings of the chair being out and affecting your playing style. So while you can read on and get a few pointers about how to choose a chair for yourself you can also go to, with all credits to this site to find a more comprehensive guide about the whole thing.
So basically you should think of two things when choosing a chair, the type of game you play and what type of movement you need with that, and the features that are offered with different types of gaming chairs.