My most favorite is Rainbow Dash, after seeing a good friend of mine cosplay as her at an anime convention, I watched some parodies, episodes, and abridged episodes that focused on her and became an instant fan. She has that cool, tomboy personality, she has a cool design, I am not sure if it has ever came out about sexual orientation, but I believe she is a good mascot for the LGBT community (not just cause of the Rainbows). And she has the best fan-made stories, AMVs, videos, and pictures. Pinkie is second and use to be first before Dash took that spot. Pinkie Pie was both the first pony I have seen as well as the first pony I learned about. Like Rainbow Dash, she has the next best pictures and videos.
If I have to rank by race: The Pegasus will be first, then the Earth Ponies, and then the Unicorns. To be honest, Twilight and Rarity are my least favorite, I like them a lot, but the other 4 are more likable to me.
That's the problem... Spell check is unreliable. I was wondering how ya'll were spelling "Twilight Sparkle" Wrong. Seriously, Pick up a dictionary guys. Ofcourse, the strangest thing, when I look it up in a thesarus. The synonyms are: Rarity,Fluttershy,Pinkie Pie, Rainbow Dash, And Applejack...
It's hard to say. At first I thought it was easy but now its among Rarity, Applejack and Pinkie Pie. Truthfully all of the Mane 6 have strong likeable traits, but I guess Pinkie Pie is best pony for her bubbly random, and psychotic personality.
Ya know, this thing is that, they're ALL great. Even though there's a 1st place and a last, they're all just as good. Right?