I don't think I have a lot in common with any of the mane six, I can relate to Sweetie Belle (best pony) much more than any of the mane six, but I'll try.
Twilight: I freak out when things don't go as planned.
Rarity: I like giving to others what I can. You know, if it's something I can do, and it would make someone else happy, I would love to do it.
Rainbow Dash: I'm scared of not living up to people's expectations.
Fluttershy: I love animals, especially dogs.
Applejack: I love apples... I guess.
Pinkie Pie: I like making others happy.