So there is a way to give your soul to Nocturnal and was thinking that it was a terrible decision to make the Dragonborn be forced to serve her when he dies. Then I got to thinking Is the deal you made with her valid as you have the soul of a dragon and she was unaware.
Then BOOM it hit me you dying and going into her realm of oblivion would be a kickass expansion you fighting for your soul or something of the sort.

What do you guys think? Mostly the reason I put so much thought into that quest is I like to RP and it's terrible knowing dragonborn in death is forced to protect her.... terrible fate for him if the don't at least do something about that deal.

There are so many ways the main character can screw up their soul in Skyrim, its hilarious.