A good friend and fine roleplayer came up with a character concept. His first time playing Ars Magica, so his character needed to be redone as his totals and so on were off.
So, he just described the concept, and told me to make it work based on the framework he had put together.
SO...Basically, for some reason or another, he's a failed apprentice. Or perhaps an apprentice who was dismissed due to what seemed to be a weak magical talent or doubts as to whether he had the gift. (I'm actually secretly going to also throw in there the possibility that another apprentice with unique supernatural talents came along for which the Master, Abelard, had a more pressing need - Send Unholiness)
SO... this character is believed untrainable as a wizard. He is allowed to hang about, clean up the lab, and basically be the 'cabin boy' for the mage and his lab.
In truth, he is a prodigal student, though this only makes itself known when he begins to secretly train himself. Grabbing a look at a book, watching the mage teach the new apprentice, and so on.
The sagas begins near the end of apprenticeship. The master mage has died/disappeared in a laboratory accident. His apprentice and household servants are invited to come to the Saga's convenant to finish apprenticeship. On the way there, disaster strikes, and the apprentice is killed - or goes missing.
The Player Character, a poorly taught apprentice with great potential (a high midichlorian count, to use an abused pop culture parallel), takes the identity of the missing and presumed dead apprentice.
That's his Dark Secret.
SO, given that... how best to represent via virtues and flaws a character who is a good self-learner, has potent magical power, but is somewhat off due to a poorly shaped Gift?
Give me your virtue and flaw suggestions if you please, sodales...