I'd say, it's about gamers who enjoy playing older titles or (re-)discover something they haven't played in a while. It's not about jumping on every hype-train to play the latest games that just came out but to appreciate them after a while and share that experience with others - often to the effect that rushed relases have been ironed out by then.

I've read many elaborated posts about how people liked the games they just played, some were real in-depth reviews while others just shared the joy of playing these games with like minded folks. It sure was one of my favourite subreddits where I've found a couple of excellent recommendations for what to play. Happy to find it here now!