Teacher Sev Headcannons
Makes sure he has enough red ink at the beginning of each term. Has a subscription for refills every few months.
Actually prefers ballpoint pens but he doesn't want to ruin his aesthetic.
He doesn't particularly like the jars of dead things but they add to the vibe he wants to project.
When he doesn't have at least one detention scheduled a week, he feels like he hasn't been productive enough.
He doesn't actually hate students like Neville, he just doesn't want anyone to die.
The only reason there isn't a rule about keeping your hair up while doing potions, like all muggle science classes, is because Snape refuses to put his hair up in front of students.
Actually has several types of robes of varying quality and shade of black and is a little miffed no one has ever noticed.
Has a spell in place in his classroom that any pet hair that may fall off a student is immediately banished to Mcgonagall's classroom.
The Potions class doesn't have to be in the dungeons but Severus decided to continue the tradition so that he is as far away from Trelawney as possible. (Drunk Trelawney is handsy)
No one but the Slytherins knows that Snape hates awkward conversation so much that he actually wrote out pamphlets to hand to people who come to his office with awkward questions or problems so that he never has to talk about it. ex. Menstruation, wet dreams, the sex talk, contraceptives and Stds, proper hygiene, bed wetting.
Snape didn't used to be that strict when he started teaching but had to adopt his bat persona because he was so young when he started that students liked to mess around in his class and people nearly died.
He notices when his first years get homesick and coddles them from a distance by remembering what favorite foods they like and ordering them from the house elves to appear at the slytherin table at dinner.
He also notices when his first years show signs of abuse and 'politely' tells off their families when he can.
Keeps a stash of all potions he brews for the infirmary in his office for all the Slytherins who don't want to go to Poppy for various reasons.
Strictly applies 'don't ask don't tell' concerning relationships and sexuality and has a zero tolerance policy for any type of bullying with the exception of letting Draco mess with Harry because of baggage.
Volunteers to referee quidditch matches to make sure Slytherin gets fair calls.
Used to brew simultaneously with the students during class to help teach them. But once he realized students were actually stupid enough that he had to watch 24/7 in case they blew everyone up, he moved to his current method of 'here is a potion, brew it now or fail'.