Right about where Harry launched into his rant to Snape about 'Harry Potter' vs. Harry Potter, I fell in love with this story. I had to pause, reread a bit of the argument for pleasure's sake, and then continue. There was such wonderful development between Harry and Snape, and they both had their own personal developments, too. Snape especially - coming to realize he was a father, and then his attraction to Harry. Beautifully done.
Other things I liked: -The small details, like Al and his orange peelings into orioles. -The scene in the tower where Harry watched Snape. So Harry, to not realize his own feelings for so long. -Snape confiscating crisps -"Harry." Snape's voice was strangely gentle. "It won't work." I loved that line so much, and the conversation around it. Perfect! -"I doubt that any other man in history has been propositioned by a fifty-year-old pregnant wizarding hero." -Snape freaking out and thinking Harry is trying to bribe Snape. All your conversations between Snape and Harry were excellent, actually, but in particular I like that scene. -Love the side AS/S. Really well-handled. Also loved human!Ginny who still cares for Harry, and the bit of James and Lily we heard about. -Harry threw up his hands. "You're right! You saw right through me! Oh well, I guess I'm just a stupid Gryffindor. How could I ever hope to pull the wool over the eyes of an intelligent Slytherin like you?" There were a lot of very emotional lines, but they were nicely counterbalanced by lines that made me laugh out loud.