Regarding the question itself, Starbound and Minecraft. Maybe Final Fantasy XII if I was to play it multiple times, as I take at the very least 100+ hours to finished it, and 250+ if I'm not in a hurry.
But regarding gaming fatigue, perhaps it could be a symptom of playing too much of only a handful of game styles? If you wouldn't mind, may I suggest to check some smaller games in length and scope, specially indies? Those tend to be rather diverse in their scopes and executions.
While I think fragmentation can grow into being a problem, trying to standardize things too much can be problematic too, as the developers would be bloating the software for features that the community may use very little, as well as, by consequence of the bloating, the devs being either limited to a design that needs to take into account the quirks of all object formats, or to make some frankenstein monster design to include those different formats.
A more reliable path, I think, is what Kbin (RIP) and its successor Mbin do, to have a section for articles and one for notes. While it's still more load on the developers and the servers, at least it shouldn't be as much as having to make sense of multiple formats together, since the two sections don't directly interfere with each other. This, on a final point, is, to my understanding, and with their respective proportions, what happens with the Linux family of operating systems, where it's also pretty fragmented, but every once in a while a way to put two different environments together appear, like Wine and Xfce translating Windows and QT5 programs, or AppImage and Flatpak trying to be as universal as possible by depending on as little default dependencies from the host system as possible.
Something I've been thinking about is that changes only happen organically, so I think it's good to not be an insistent advocate for a platform X, Y or Z. Instead, I think that perhaps it's better, instead, to simply use the platform the person is more favorable towards whenever possible, and if people then share something worth sharing, it should slowly bring people over. And regarding the annoying part, at most, making a note about technicalities and the type of people in the site could be good if discussions the person is engaged in allows, and if the person didn't burn people's patience by being pedantic.
From the little I have seen, there seemed to be quite a few on Misskey instances, though I don't know how representative it is if compared to, e.g., X/Twitter, where most of the artists I would find were at.
Got RISC OS
mom, I'm scared