Maybe another way to look at this is that I can't get into games that feel like projects. Building a base in DF is a project. If I'm going to be working on a project, why not a programming project that will actually create value in my life and others'? With something like Overwatch (team-based FPS with 15-30 minute matches) on the the other hand, it feels more like an activity, like watching a movie or playing a sport. I feel comfortable playing it for two hours one day and picking it back up the next day or the next week or just whenever I want to spend some time relaxing.