(Why isn’t anyone submitting anything?)
Pick whatever makes you tear up and submit it in a suggestion.
Also take a look at the other pages as well. Some of them have surprisingly good results.
Final Dreams of a Filly: http://browse.deviantart.com/?qh=§ion=&q=pinkie+sad+fanfiction#/d4d91ng
Today, Tomorrow, and Forever: https://docs.google.com/document/d/1xy28CF7zMdwfbmRnBnIXygJxnHR7UZqgSdjt7YX0dBA/edit?hl=en&pli=1
My Only Sunshine: http://www.fimfiction.net/story/8534/1/My-Only-Sunshine/Dusk