Princess Luna is set with the most unimaginable, unwanted, despicable task she has ever been given: Raising a human child.

Accidentally ending up in the jungles of God knows where, a yellow(ish) pegasus assists you in attempting to get back to a place you can't even remember : Home.

To put it simply, you travel to Equestria, meet everypony, and get with Celestia. Not bad

You decide to overthrow the government. You fail, so maybe getting an evil pony's help would do the trick

You're a Royal Guard. Soarin is a Wonderbolt. You get together. Romance and comedy ensue, as one would expect

After a terrible accident, you have recurring nightmares

Injured and alone in the middle of the desert, you are found by Cherry Jubilee. Clop ensues.

Applejack has always been an upstanding citizen of Ponyville, and Mayor Mare thinks she deserves a reward.