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 really like exploration era sailing games. Trade and explore. Upgrade ships etc. I’ve tried them all and none are that great. But the idea is something I really like. If something like Uncharted Waters combined with Black Flag ever came out I’d be in gaming heaven.
I still remember spending an unhealthy amount of time playing the NES version as a kid. Then traded it for another addiction when I started Civ on PC.
I remember playing sick one day just to play the original. Such a good game for its time. Koei games back then weee so good.