I'm working on a pet project that I like to think of as a mix between GTA, Freelancer, and Dwarf Fortress. Most of the content is procedurally generated, and you'll be flying around in space doing pretty much whatever you want. You'll be able to find derelict ships to board, you'll be able to ambush peaceful traders to rob them (or, of course, trade peacefully yourself, either by buying/selling goods or by mining raw materials and selling that, and there will be some sort of crafting as well), you'll be able to investigate ruins of lost alien civilizations (there will also be living alien civilizations in the game), you'll be able to build your own space station (or city, if you land on a planet) and if you place it well, people will come there to trade/interact/live there, so basically you'll be able to set up a little space kingdom of your own if you want.
I like procedural generation. If you get it right, you not only get a lot of variety, you get something that often seems more realistic than it would if it was hand-made.