Everyone tells me I'd love factorio. Every time I load up the intro tutorial I have the intention of finally diving in and just.... nothing. I can't get into it. I don't feel an incentive to learn the building and crafting UI's. It just feels like work. I'm not even sure why I'm building the things I'm building, or what the aim of the game is.
Maybe rimworld sucks me in because I can immediately empathize with the plight of the survivor, whereas factorio seems to be all about building efficient machines for the sake of building efficient machines.