What are Snape's hobbies? What does he do to relax, when he's not off being a Death Eater/Dumbledore's spy?
I would extend it to include all the little things in Snape's personal life: Does he smoke? Drink anything besides Elf-made wine? What is his favorite tea? How does it take it? Does he ever going to the local Tesco? ;) Does he have a subscription to Potions Monthly? Does he send letters to the editor? Is he re-reading Dante's Inferno yet again? What is Snape's life like away from Hogwarts and Voldemort?