2) a mannerism that you accidentally slipped in and now you are stuck to
I don't know if I have a good answer for this question. Maybe I include a mannerism accidentally and I haven't become aware of it yet.
6) a mode of transportation that has a lot of potential
One of the things I like about Goblet of Fire is how it expands the wizarding world. Before then, magical transportation mostly consisted of the Hogwarts Express and Mr. Weasley's enchanted Ford Anglia. But Goblet of Fire introduces enchanted ships, flying carriages, and Portkeys. making the magical world feel much larger and more diverse.
I also really like how @artemisia-black uses an enchanted carriage for the Black family to travel to Italy. It inspired me to think, not necessarily of a specific mode of magical transportation but of how we can use transportation to signal class and pure-blood politics.
I like the idea that the wizarding world has an unspoken historical cutoff when it comes to adopting Muggle inventions. The older and more established a piece of technology is, the more acceptable it becomes to enchant and integrate into magical life. Steam trains, sailing ships, horse-drawn carriages, and bicycles have existed long enough to feel almost timeless, so they're viewed as suitable foundations for magical adaptation.
Modern inventions, on the other hand, remain distinctly "Muggle" in the eyes of many witches and wizards. Cars, airplanes, televisions, computers, and phones are often dismissed, not because they couldn't be enchanted, but because wizarding society has been slow to embrace them.
This helps explain why the wizarding world still relies on radios, parchment, quills, and steam trains decades after Muggles have moved on. It's not simply technological backwardness; it's cultural conservatism. Wizarding society tends to preserve traditions rather than replace them.
I think this could also create an interesting generational and political divide.
Younger witches and wizards—or those raised by Muggles—might see no reason an enchanted electric car, high-speed train, or even a magically modified laptop couldn't exist.
Older pure-blood families, meanwhile, would cling to traditional forms of transportation because they see them as inherently more "wizarding." They'd happily travel by enchanted carriage or private magical railway while dismissing enchanted automobiles as vulgar Muggle imports.
The irony, of course, is that the distinction is largely imaginary. A steam locomotive is just as much a Muggle invention as a car. A horse-drawn carriage originated in the non-magical world just as surely as an automobile did.
Societies often convince themselves that older customs are part of their own identity while treating newer influences as foreign, even when both come from the same source. In that sense, the preference for enchanted carriages over enchanted cars isn't really about transportation at all. It's about identity, and the stories people tell themselves about what makes their culture unique.
7) a coping mechanism (pick a character that uses it)
I think a lot of my characters rely on humor, and because these are JKR's characters, the humor sometimes borders on cruelty as a way to deflect from uncomfortable emotions or stressful situations. It's easier to make a cutting joke than admit you're scared, hurt, or overwhelmed.
In my Jily Lives AU, James especially falls into this pattern. He's avoidant (though not to the same extent as Remus, obviously). James has built so much of his identity around being the leader, the dependable one, the person everyone else leans on. He wants to be the one solving problems, protecting people, and holding the group together.
What he's much less comfortable with is letting other people do those things for him.
He hates feeling vulnerable. He hates looking like he doesn't have everything under control. So when he's emotionally cornered, he often regresses into some of his younger habits. A sharp or mean-spirited joke slips out before he can stop it. He becomes impulsive, overconfident, or reckless, convincing himself that action is better than sitting with emotions he'd rather not acknowledge.
It's not that James lacks emotional intelligence; he's actually quite perceptive when it comes to other people, as we see him befriend and take care of a werewolf and provide shelter to a runaway friend. The problem is that he struggles to apply that same understanding to himself. He's happy to shoulder everyone else's burdens but deeply uncomfortable admitting that he needs help with his own.
Sirius and Lily recognize these patterns because they've seen them before, and neither of them is willing to let him hide behind charm or bravado forever. Lily is often the first to call him out when his humor crosses into cruelty or self-destruction, while Sirius has a way of cutting through the performance entirely. Together, they remind James that being a leader doesn't mean carrying everything alone, and that asking for support isn't a sign of weakness.
Ask game: the writer’s favourite details