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.
Things like C&C. If you know current ones, let me know. I didn’t really research anymore. Most of what I’ve seen in the past had some random new spin on it.
Friend of mine just released Terrytorial Disputes. Not exactly C&C, but heavily inspired with a mix of tower defense. It’s got a free demo if you want to check it out
I’ve heard good things about Beyond All Reason, although I haven’t had a chance to properly try it myself yet.