When I first saw her in the show, I thought: Bipolar. Though I soon learned that, that was not the case. The thing about Rarity, is that she endeavours not only to keep her shop open and producting high-quality clothing: Artistic/Work-a-holic/Tenacious She makes time for her friends and enjoys the joy that her hard work brings them: Friendly/Generous/Courteous .... among many other things. Its just that she is a very complex character, and though it is hard to incorporate a character like that in Fan-Fiction, it leaves a spectacular challenge to study this character, and many fans who enjoy both her antics and flavorful attitude will have a rewarding time trying to add her to their own story in Equestria.