Here is an interesting fan theory about Snape. What if he actually isn't dead? I mean, he's a potions master and the Half Blood Prince so when he got bit by Nagini surely he must have had an antidote on him or knew a way to create one. And the book never says anything about finding his body after the Battle of Hogwarts. They took all of the dead bodies and placed them in the Great Hall but they never mentioned Snape's body. My theory is that he used the antidote and ran off to live the rest of his life in peace and quiet. Tell me what you think!!!