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.
One of my favorite mechanics is when you place tiles next to each other and the effectiveness of the tiles depends on what is next to them. Suburbia does this but almost goes too far in my opinion. It’s way too much to easily keep track of.
A game called Cité is my favorite for this because you share a border with your opponents and you can make deals out of it. “I’ll put my x2 multiplier on the border here if you give me one Cloth per turn.”