Katie Evering-Plato's Imitation

Plato's discussion on what is real and what can be seen as imitation is an interesting one to say the least. Plato discusses that only the true maker of objects is real in its natural form, i.e God because He is the maker of all things and the craftsmen who take God's creations and change its natural form into something of personal use (Plato used a bed and table) are simple imitators. Today imitation is a term with many meanings. An imitator is someone who has created an appearance of the truth. One use of imitation is negative, imitating what is considered "real" and making your own while claiming it as the "real" thing, example, anything you buy off a street vendor with designer labels at a "discounted" price, which if caught by authorities is illegal and could result in fines. While another form of imitation can be as use for entertainment, creating an imitation for personal use, another example, Tina Fey imitates politician Sarah Palin for a comedic result, while anyone can walk into a craft store and buy a Paint-By-Numbers, follow the given directions and they have an imitation of Dega, Picasso and other artists' popular works hanging above their fireplace. So in a sense Plato says that everyone is an imitator, but my question is there differentiating categories on imitators? Are some imitators better than others at their creations? And if so, who makes that decision?