This might be a bit late, but I have a few ideas.
Perhaps if you sided with the Empire during the war, you could become jarl of windhelm after Brunwulf is assassinated by a group of stormcloak supporters. There could be a questline around routing them out, winning over the support of the people of Windhelm, rebuilding Windhelm's economy and it's army.
If you sided with the Stormcloaks, Elisif could be "persuaded" to step down as jarl of solitude, and virtually the same thing happens.
Or you could rebuild Helgen on behalf of the Jarl of Falkreath/Empire before you join the civil war (you wouldn't be a jarl, but you could be an independent governor/Thane of Falkreath etc) Build your army and then choose which side you will join (or you could try to stay out of the war)
Or maybe something a bit different again. Players of Bloodmoon may remember the brutal nordic tribesmen and the mead hall of Thirsk. In contrast, Skyrim seems to be more civilized. Perhaps a mod that adds a barbarian nordic tribe (or maybe a few tribes) to Skyrim with their own village(s) and chieftain(s). And to make the complete barbarian scene, they worship the old nordic gods (Shor, Kyne etc). Perhaps the player could come across them, be accepted by them, and eventually become Chieftain.
Edited by RighthandofSithis, 30 December 2011 - 08:50 AM.