There's things I like about the Skin. I think I'm a sucker for the skins that revolve around special Conditions.
I would argue strongly against the backstory "Someone thinks you are a menace and fights you" - Starting out, simple antagonist relationships are rarely fun (Developed in play, complicated oppositional relationships are often fun).
I think I would inject more "What does it mean to be a teenager and to be an ancient?" in regards to how the Skin plays, And "What does it mean to be a teenager, while there's an ancient running around?" in regards to how the Skin effects other people.