Imagine a DLC similar to Hearthfire, but instead of building a homestead you could establish a city. You could start out small and then as you gain more and more residents you could expand the land of your city. Also you could recruit people for defense. You could be the Jarl of your own city. Buuuuuuut someone probably already made a mod for this.
I remember that time everyone was so excited for hammerfell, but bethesda was all, "Nope, we're gonna work on Fallout 4. Oh, and we'll be leaving your game wallowing in disappointment." And then they try to give you a high five and you're just like, "no." then they leave laughing "Okay!"
When you're a PC user you can get "little" DLC's for free.
There are also countless questmods to find, from great ones to plain rubbish.
My apologise to all console players for pointing this out.