LOL...I love that scene in COS. Okay, I love every scene with Severus in the entire series. But I digress.... :P

Lucius is an arrogant asshole, but he's an arrogant asshole who loves his family. So there's a bit of hope for redemption. Sirius, on the other hand, I don't see a hope for redemption. But my school life was like Severus'...so I might be a wee bit prejudicted. :P