Think of power. Think of domination. Think of accomplishing these things with blood, pain, and consorting with demons. Like to dabble in the undead? Sorcery is for you, then. Only the most greedy and black hearted souls walk down the Path of Sorcery, but that's just how they like it.
Their Prime Requisite is intelligence, giving them an advantage in regards to knowledge and magic. Sorcery is a highly specialized field, however, so they will never be said to be good at wielding a sword.