Diehard Brony/Whovian. Discord is best villain, Fluttershy is best canon pony, and askdiscordwhooves is best pony (check him out on tumblr). any questions? Hope to be a valuable member here!
Sweetie Belle doesn't know what's going on with herself, and goes to her sister for help. Extreme awkwardness ensues. Don't read if you don't like "if ponies had periods" stories.
OC-Centric Story: Winter Gale is a flightless pegasus, and best friends with Scootaloo, a wonderful flier and all around perfect pony (in her eyes, at least). She's really oblivious, though, and that ends up as Winter's downfall.