So far, I have now one favotire "Best Pony" episode.
It's fun, I have a favorite episode in every Season, and obviously "Slice of Life" is my BEST-EPISODE-EVER (So much PONY!!) but lately, one episode hit me in a personal level, made me cry even more than "Flight to the Finish", and it's named "Amending Fences". It was shown to us the possible outcome if Twilight had never embraced Friendship as he did.
But I have one fav Episode in every season:
S3-Keep Calm and Flutter on
S5- This one has three in order of importance; best episode EVER: "Slice of life". Best episode of this Season: "Amending fences". Honorific mention: "Make new friends but Keep Discord".
Hey Misty, can you handle this much adorableness?: