I would like to invite you to join me in a thought exercise, submit a Character Concept that, In Theory, would be fantastically powerful or influential, but In Practice, would actually be little better than average.
For example:
Tom Dane, Barber to the Supernatural
In Theory Tom would be the most powerful member of the supernatural in the world. With only a single Fate Point Tom's player could Declare he has access to the hair of anyone from the Red King to The Merlin himself, allowing him to shape the world with little more than a Thaumaturgy spell.
In Practice anyone who WOULD get their hair cut likely wouldn't get it cut by anyone who they didn't trust implicitly. Besides, The Merlin is Bald, idiot.
Your turn!
EDIT: While left unsaid at first, I decided I would clarify that basic logic wouldn't be required, this is purely for fun.
