The reason Snape hates Neville so much is because Neville could have been the Chosen One, meaning Lily could have survived. (Also because Neville sucks at Potions.)
Voldemort cannot love because he was conceived under the effects of a love potion.
After the Horcrux in Harry was destroyed, he lost the ability to speak Parseltongue
Prof. McGonagall played on the Gryffindor Quidditch team when she attended Hogwarts.
Hermione returned to Hogwarts JUST because she wanted to complete her 7th year. (She be hardcore.)
Snape is the ONLY Death Eater who can produce a Patronus.
Both Harry and Dumbledore have been in possession of all the three Deathly Hallows.
Joanne originally planned to kill Arthur in Order Of The Phoenix instead of Sirius. ( Godammit, Joanne.)
Harry, Ron and Hermione were all put on Chocolate Frog cards. Both Ron and Dumbledore consider this their greatest achievements.
After Kingsley became the new Minister of Magic, he told everyone that participated in the Battle of Hogwarts could have a job as an auror even without N.E.W.Ts.
So yeah, first chap out of the way! :D