…I think Draco would be very gifted in Occlumency, unlike Harry. Harry’s problem with it was always that his emotions were too near the surface and that he is in some ways too damaged. But he’s also very in touch with his feelings about what’s happened to him. He’s not repressed, he’s quite honest about facing them, and he couldn’t suppress them, he couldn’t suppress these memories. But I thought of Draco as someone who is very capable of compartmentalizing his life and his emotions, and always has done. So he’s shut down his pity, enabling him to bully effectively. He’s shut down compassion — how else would you become a Death Eater? So he suppresses virtually all of the good side of himself.
J.K. Rowling (during a MuggleNet interview)