I have played through a half a game on Civ 6 and am thrilled. Like original-cast Star Trek movies, every other episode is really good. This one feels excellent.
I have a new geek obsession called Factorio. Basically, you have to create an ever more complex production base with zillions of different intermediate products zipping this way and that on conveyors, all while fighting off aliens.
I played Stellaris for quite a while but got bogged down in the end game. Tons of potential, maybe Stellaris 2 will crack the code.
Speaking of that, I did enjoy Endless Space, judging it good but not great (ie not totally addictive). The pre-release version of Endless Space 2 has dropped and I am just starting to try it out. Endless Legend was a really good alternate take on the Civ model and I am hoping that Endless Space 2 will do the same for space 4x.