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.
Stealth games. The last one for me was MGS5, I loved it even with its shaky story line. Hitman is really nice but it feels more like a puzzle game if that makes sense.
I concur. Hitman can be a somewhat true stealth game but the design steers you away from “free form” stealth with its mission stories. I like the idea but the puzzles are too small, few short steps to the goal.
I hope for Metal Gear Delta to succeed, not only because I have a soft spot for MGS3 but also to revive the genre.