I'm hoping for something that allows the player to own their own plot of land (like a small village or homestead). So there'd be shops of your choosing (blacksmith, alchemist, book shop e.t.c), you could choose the race of your guards (if you wanted more Khajiit in the game for example) and you could choose your town's flag and colours. You could choose who to side with in the civil war and whether there'll be a Thieves Guild presence and stuff like that.
It sort of goes back to Morrowind where you could build your own home when you got to a certain level in a faction or guild. Basically, I want more places to live

Ya know, that could be built into a DLC, where you reconquer Helgen and take it from the idiot bandits, then rebuild it. You'd have to do something about the cave section to either seal it off permanently or maintain security there as well.
Maybe you could recruit people to join your new town. For instance, the farmer guy and his wife who are wandering everywhere - they could become citizens. You'll need a captain of the guard, who could be one of the hired mercenaries. You'll need personal security, perhaps in the form of a member of the Dark Brohood. Depending on your commercial ties, you might want to have a Thieves guild representative there. Without question you'll need a court wizard, so Winterhold's college will need to release someone.
Lots of room for a cool dlc - especially if someone/something unpleasant has taken over the cave area, and the bandits decide that they want to keep or retake the town from you. Also, you'll become involved in the civil war, and can expect the imperials, the stormcloaks, and even the thalmor to want to interact with you. Perhaps the dunmer will approach you and ask you to make the place a refuge for their kind in skyrim - that could get REALLY interesting. Perhaps the khajiit caravans will ask for something similar.
One of these days I'm gonna grab the game mod tools and start spitting out DLC's like a madman.
