Too easy! Reason why Fluttershy is best pony:
1. Extremly Cute, can make one go d'awwwww without doing anything
2. Kind to everybody no matter who it is. That's something few can do
3. Shy, which I can relate to
4. When her friends are in need, she can do the bravest things, like in Dragonshy
5. Great singer and got the sweetest and most beautiful voice