Twilight's been my favourite for a long time. Initially, it went from her, to Rainbow Dash, Pinkie, Rarity and now it's Twi again. Spoiler
Not to be that pone but I picked Rainbow Dash. Mostly because she has the same personality I have in everyday life.
*Proceeds to swoop through with pro-Rainbow Dash propaganda* Just 10 more votes for her to be highest ranked!* Come on everypony! *At last count only. Subject to change.
I'll have to go with Rainbowdash. From the beginning on it was rd, then it was fs and now it's rd again. Fs still holds the spot for second best mane six, though.
Come on Pinkie Pie!!! Think of all the fun we can have with her if she wins that party will be amazing!!!
My favourite since the very beginning has been Applejack. She's down-to-earth (maybe kinda obvious since she's an earth pony), honest, straightforward, plus those gorgeous green eyes and an accent to melt your heart.
Wow, it's good that everyone has their own favorite. By that, I mean I like how all of the main characters got a good amount of votes. Though years of pruning have made me appreciate and love all of the main characters, my favorite is still Fluttershy. Not only do I still relate to her incredibly well, but the fact that she works so well with Discord, my second favorite character, just seals the deal for me.