Ministry of Magic- Snape vs. Snape
This is definitely one of my most favorite songs of all time. Considering the fact that the only music I listen to is Wizard Rock(and also Trock sometimes, which is music about Doctor Who) and that my favorite band is Ministry of Magic AND that I'm in love with Snape, it should be obvious. And of course, my other favorites are also songs about Snape.
I really think this song sums up how Snape feels about everyone hating him when they find out he used to be a Death Eater. He must feel so horrible, being more loyal to Dumbledore than they could ever be and not being able to prove it, or tell them why.
Also, I think the girl's part is supposed to represent all the naysayers that refuse to believe that Snape can be trusted, as well as a little nagging bitch inside of him. The only thing keeping him from going over to the Dark Side is Lily... :'(
As sad as the lyrics can make you if you really pay attention, I love how it's so upbeat. All of MoM's songs are- even the ones that are supposed to be sad.