Rainbow dash all the way. It's just my opinion, but I love her character so much, primarily because a lot of my own attributes are mirrored in her. I'm an adrenaline junkie, a tad bit cocky sometimes, and athletic, so I guess I just picked myself out of the mane 6. Her character is the most dynamic and fleshed out of the cast, and she has matured so much throughout the show. I'ma keep going bc I love dashie so darn much. She's the least materialistic, and the most down-to-earth, as she focuses on physical self-improvement, and is very goal-oriented. She's adventurous, headstrong, brash, yet lovable, and altogether the best pony.
(rarity's ok too i guess)