Alan Rickman played Snape like a poker player carries the winning cards. Quietly. Calmly. Delicately. He shone at the right times and stood out when surrounded by champions. Emma Thompson, Robbie Coltrane, Michael Gambon. He outshone, and out-played them all. Whereas they were actors playing a part, he was Severus Snape. Being incredibly Severus Snape.