pinkie pie mostly with a little twilight craving for knowledge, Applejack's stubbornness, Rarities work habits (sadly), Rainbow Dash's way of choosing what I like and don't like (I am awesome and what I like is awesome), and Fluttershys awkwardness at times.
I'm far more of a mix than like any particular one. Closest I'd say is Twilight, because I'm something of a scholar, and not exactly well versed in social situations. But I am an artistic soul like Rarity. An honest and hard worker like Applejack. Shy to a fault like Fluttershy, but always willing to help just like her. I love to see people smile, and am often zany and random like Pinkie. I'm prone to getting a little overconfident when I'm in my element, love to be free, and somewhat easily annoyed by others like Rainbow, but once I consider you a friend, I'd drop anything and everything to help you when you need it. But yeah, closest thing would be a Twilight still struggling to overcome the social awkwardness.