I don't see why you couldn't role
I'll check out that book, thanks!
As for the point of the thread, I just want ideas for background stories. For example, if I made a warrior, I could roleplay him as a former Blade (just an example, it wouldn't actually work in Skyrim for spoilerish reasons).
I don't see why you couldn't role play your character this way. Mine is a former thief who has decided to take a turn in life and learn a little about magic and the more "honorable" combat forms from the companions. That doesn't mean he doesn't still make use of his previously learned talents however....
He is therefore a thief, an assassin, a battle mage, a warrior, a night blade and all of those things in one. His "class" happens to be whichever one describes him best when I play him a particular way