Would Snape turn out to be good or evil in book 7? We thought it would be fun to be BOTH.

My sister (Shinteetah) and I made near-identical Snape costumes, and worked the release-night crowd as Good Snape and Evil Snape -- she with a basket of candy and kind comments on the work of each "student," and I with my little black book, ready to take points from each student's House for having candy in class (or any other convenient excuse). Quite fun!