I'll start:
My Queen, who'd gone through a lot of bad shit, mostly self inflicted, wanted something supernatural about her character, and as she had more than enough xp (we judged, we never really keep track).
She chose a move from the Infernal skin, Soul Debt and the bargain Strings attached.
Now, since the character had no idea the supernatural existed, we had to sort of ease her into it, and find out what form her contact with the infernal entity would take, and also what initial bargains she might have made. Trouble was, we risked having to retcon, because we figured she had to have made at least one bargain before without knowing it.
This was the solution: Her diary, an old leatherbound book she'd been writing in since she was ten (and had strangely never run out of blank pages(), was the connection.
Her first wish: "I just want to be popular". And of course, she was. Everyone wanted to be around her. The hottest guy in school asked her out. She had her gaggle of cheerleaders. She had followers. She had admirers. She had no friends.
The second wish was where she discovered that all was not right in the world.
She'd just had a fight with her father (we'd never met her mother, but assumed she was doing trophy-wife stuff such as shopping and rehab), who ended up grounding her like a child. Off to the diary, where she wrote "I wish he'd just go away on one his stupid business trips and never come back!!!" And the diary said, in flowing script, "DONE!!!"
And off her father went to the airport. Hours passed, and the police knocked on the door and informed her of his sad demise. Death by bus.