Starfield - Exploring for new structures and doing some Mission board missions
Have been searching always for something I haven't seen or encounter yet, staying in the same system means less likely to see something or do something I haven't done before. So I have been setting down in a system that I haven't been in much and when I see a structure shape I don't recognize I go see what's what.
So far most of the unusual structures are some kind of an outpost, be it deserted or occupied. The occupied ones tend to have non-hostile NPCs and maybe also a simple request for assistance.