I played trough the main storyline and the various guild quests with an assassin/thief/archer/dualwielder/mage/enchanter. Finished on 60something level and it was pretty epic. Thou I lost interest somewhere not long after the 100 enchant, smiting and alchemy. The game on Master became too easy.
So now I play a breton illusionist-thief, not caring about the plot and wandering around. Rage spells are fun, fear also helps a lot. :)