I've always wondered what makes certain games enjoyable even after you have played them many times. For me, simple gameplay, good strategy, and the ability to discover something different each time can make a big difference.
Nostalgia is another factor. Some older games remain enjoyable because their gameplay is easy to understand while still offering enough challenge to keep you interested. Fan-made projects can also be interesting because they sometimes introduce new ideas to familiar games.
I've been exploring different Plants vs. Zombies projects and game versions as well, and I keep some of the information: https://pvzfusionapkinfo.com/versiones-antiguas/
What makes a game worth coming back to for you? Is it gameplay, nostalgia, new updates, multiplayer, or something else?