This would mean that Snape probably spent weeks trying to think of something cryptic and symbolic to say to little Harry, just to see if he'd understand. And of course Harry was like, "Guh, what?" So Snape was like, "Snarl! You're just like your father!"
According to Pottermore my Patronus is a wild boar but who knows, and I'm pretty sure in the mirror I would be along because honestly what I love the most is a quiet of my own thoughts and, frankly I think my Boggart would be myself, but again, who knows.