Meanwhile, in Morrowind and Daggerfall (and even Arena, sort of), the plots were less world-shaking and therefore it encouraged you to do your own thing rather than racing to a finish line. Skyrim is more even-handed with allowing you to set your own motivations, and whether or not you...
Doing it over and changing your choices would remove the whole game wonder for me, I have to force myself down a route I wouldn't go. It also would ruin the "film" aspect of the game. Who wants to re-watch an awesome movie, just to find out all the plots changed? A different ...