Applejack is probably the most noble and admirable character, and I think she is the best to idolize among the mane six....
From all of my experiences and interests in trying to relate to I always wind up finding I am most like Rainbow Dash however...
Starlight Glimmer and Trixie are my favorites, they have a lot of added negative attention from people in the fandom who don't actually cherish the theme of the show and believe that only ponies that have had a heart of gold their entire lives can positively develop.. They are both intelligible characters with their own positive character quirks who have character specific talents and have come a very long way... liking Starlight simply on the merit of her excess power is redundant, she is a great character who genuinely needed to be enlightened and to have meaningful friendships to inspire some sort of independent resolve with a positive purpose. Nobody was pulling legs trying to get three former villains to sacrifice their time and well being to rescue ponies they once rivaled... especially if you consider the power Discord, and Starlight had outside of that tower... (although disharmony could have negatively impacted them) I just think giving characters identities some people wont like, is the only way you will have a show that everyone can... welcome to any universe and the real world at that, where people are all different, and another reason to like the moral of the season 5 opener... reminds of that episode of PPG "See me, feel me, gnomey" without someone to conflict with your interests, there is no purpose... giving characters personalities that are not the same is essentially half of what "social life" is about is it not...
NOTE: that is said with social implications... not necessarily political implications. the reason a social society is feared is because you dont want social rule in social relations, only in economics... you dont want a world where you can be executed or even jailed for saying something, that someone else just isnt fond of....