My copy says 'some', too, not 'every'. It's optional. Note, though, that it can be and advantage, a disadvantage, or both. Taking Dresden's aspect as an example, it means that he can be compelled by his temper, or compelled when trying to use subtle magic, or invoked when feeding anger into his spells for extra umph! And even those disadvantages get him Fate points, which generally come in handy later...