As per title. I personally really enjoy deckbuilding / engine builders and civilisation games, but most of them understandably end just as you’re hitting the sweet spot of getting your engine up and running. Probably why Through the Ages is my favorite game - has all the mechanics I like, but lasts long enough that I feel like I get a chance to run them.
I like games that involve mechanics that change the rules. Magic: the gathering is a big example of that, but Villainous also does it kinda, where each villain has their own goals and rules and the game is a race to achieve your villain’s goals before the others do.