I have fun reading textbooks and practicing foreign languages. It's not as concentrated fun as you get from a superstimulus like a video game, but it lasts longer and is more psychologically rewarding.
I used to play games to relax. But like eating unhealthy food, the benefit was ephemeral and the consequences lasting. Applying rationality to my own life (long before the existence of LW) resulted in ejecting that part of my life and finding more productive alternatives. My life is better as a result: I subjectively experience more fun and make better progress on my life goals.
I've been clean from video games for >10 years, and I could not recommend it more.
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