You could roleplay as a mage who has had bad experiences with necromancers in the past - witnessed them do some horrible things to innocents - or even someone who is an ex-necromancer seeking repentance. You can specialise in the Restoration turn undead spells and in Draugr dungeons wield an enchanted silver sword named "Galerion". Then one day you are bitten by a vampire that you are just about to slay and you find yourself turning into one of the undead yourself. You are racked with self-disgust and confusion, but you begin to notice your powers exponentially grow as your deeper understanding of fighting undead (ahem Necromage perk) allows you to tap deep into the dark magicks. And then you have a choice to make - either come back to the light and relinquish your newfound powers, or embrace them and make pacts with daedra etc and become a shadow of your former self (quite literally).
OR
You are an aged high elf and aldmeri dissident who was a young lad during the days of the oblivion crisis. You saw the thalmor rise to power and have always been sceptical of their motives. When you spoke out, you had assassins sent after you, and you were forced to flee your home on sumerset isle. You fled to cyrodil, attempted to warn the empire in vain. When the great war came you joined the legion and used your magickal prowess to fight the thalmor, your brethren. However when the empire signed the peace treaty and affiliated themselves with the thalmor, you had a bounty put on your head and were forced to flee even further north to skyrim, where you were caught and were about to be executed but luckily escaped. Now you are sympathetic to the stormcloak cause, yet find them unwilling to trust you because you are a high elf. You feel you could aid them greatly in their battle because of their complete lack of appreciation or knowledge of magic, but first must prove yourself to them.
OR
You are a friend of calcemo, trying to uncover the mysteries of the dwemer and the snow elves. You delve deep into dangerous dungeons to uncover artifacts and rebuild the knowledge base on these lost races.
OR
You have heard tales of the ancient magic possessed by the undead dragon priests. You are fascinated by nordic history and know that there is very deep magic at work there, far beyond what the sword swinging barbarians of today would tell you. You make it your quest to seek out the lost knowledge of the dragon priests.
OR
You are disgusted by the vile hedge-magic the reach witchmen - the forsworn - use. You feel hagravens are an affront to magic and humanity and feel you must wage war on them and the forsworn who shelter them. You begin your investigation in markarth, and find yourself more caught up in a web of lies than you intended....