For me it’s first person puzzle games. I can think of maybe a dozen off the top of my head that came out in the last decade. I especially enjoy when they’re open world. The ability to just quit a puzzle that’s stumped you and go try something else for a little bit is incredibly refreshing.
I contend that there are more games out there now that are made for the sake of making them than ever before. It’s just that fewer and fewer of these games are AAA titles. The indy scene is really what are making these games nowadays.
That or modding. Modded Minecraft is done purely because someone wanted to have the functionality of magic wands or engineering or resource processing in their lego game. It’s completely unmonetized and gets extremely involved very fast. I fondly remember my nuclear reactor exploding and having to work around the irradiated zone. Good times.
the indie scene may be greater for that but is also filled with the same money making trite and on top of that constantly copying each other and barely doing anything new.