Hey remember that Derpy day/muffin day we had on the 1st of March in 2011? People would give you a muffin and sometimes ask you to sing She's an Evil Enchantress (the Pinkie Pie song from Bridle Gossip).
While batponies, planeponies, mothponies, foodponies are fun, they're too much of a gimmick and they're only in fan art. We need something more tangible.
Then there was the short 1-4 pages fanfiction stories like Derpy's cutie mark story and Derpy being in charge of the mail.
Vinyl's glasses, man. Look into them.