Mine is vehicle building games like Stormworks or Scrap Mechanic. It’s so much fun to shoot at your friends with your latest nuclear drone while hiding in your bunker with a better defence system than Area 51 !
I’m very curious about your fav niche game genre !
(I’m sorry for my bad English ^^')
I love the Mystery Dungeon games. Most people know about the Pokemon Mystery Dungeon ones, but there are also Etrian Mystery Dungeon I & II, Shiren the Wanderer titles, Taloon’s Great Adventure, Chocobo Mystery Dungeon, and more!
I like them because they are pretty casual games you can pick up and put down easily, but if you want to get deeper into the strategy, you can. We didn’t get these games in the West until the Nintendo DS era, but they started with the SNES in Japan.