There are pranks, and then there are pranks. Sometimes, though, the joke goes too far. Mostly James, Remus, and Sirius, sixth year.
Twas in another lifetime, one of toil and blood... Sirius runs away from home for good over a black trenchcoat. So he says, anyway. Rated for very minor profanity and an excess of boy angst.
She isn't asking for much, just a promise of 'someday.' RT, set during HBP. Rated for angst and a tiny bit of minor language.
...or, five ways That One Scene could have been less gross. Dr. Carol Marcus is nobody's meat.
The Doctor, Martha, and Jack rewound time during the Master's takeover of Earth, but all those memories from the Year That Wasn't had to go somewhere-and Luke Smith, with all his untapped telepathic/telekinetic potential, ends up making an unfortunately good lightning rod. Crossover with Heroes, but mostly Whoniverse, including Torchwood and Doctor Who (through series 4).
Remus comes home for the last time. Remus/Tonks angstfluff, with various Deathly Hallows spoilers.
Blacks pick names from the stars, so they are stargazing for their child. They don't pick a star-name, but it ends up coming from the sky anyway. RT. DH spoilers, canon-character death. Starts with fluff, ends with serious angst.
Remus knows the truth now, and so he wonders different things. They are not pleasant either. Christmas Eve at number twelve, Grimmauld Place.
Sirius, escaping from Azkaban as Padfoot, eats his first rat. A rather strange and dark double drabble and a half. Rated for subject matter.
Sirius is thinking about the cold, because in Azkaban, that's all he has anymore. Much angst, as usual. Oneshot.
This is the absolute end of the Marauders, he thinks. Remus, right after Sirius's death. Oneshot.
Nymphadora Tonks wonders, sometimes, if she's doing the right thing. RT, not very fluffy. Rated for dream sequence violence. Oneshot.
Draco thinks the mark on his arm makes him a Death Eater, but it's not quite so easy when he's faced with a real human being to kill. HBPspoilery. Oneshot.