To what extent does being a "good pony" mean?
Can you be generous to the point of indulgent, or oblivious to being taken advantage of?
Can you be loyal to the point of following blindly, or backfire when that pony betrays you?
Can you be kind to the point of solicitousness, or inadvertently spoil the pony you are kind to?
Can you be joyeous to the point of over-optimistic, and not know when to give up?
Can you be honest to the very core, not even white lies, and hurt somepony else instead?
These are the tales of few unheard individuals that struggled morally.