There are certain parts of perfectionism that are good but I think that the word brings up negative connotations. the definition that you have given for perfectionism (taken from Wikipedia) is "Perfectionism, in psychology, is a personality disposition characterized by an individual striving for flawlessness and setting excessively high performance standards, accompanied by overly critical self-evaluations and concerns regarding others' evaluations. It is best conceptualized as a multidimensional characteristic, as psychologists agree that there are many positive and negative aspects. In its maladaptive form, perfectionism drives individuals to attempt to achieve an unattainable ideal, and their adaptive perfectionism can sometimes motivate them to reach their goals. In the end, they derive pleasure from doing so. When perfectionists do not reach their goals, they often fall into depression."

Perfectionism is good in the fact that it rewards perfect creations and projects and negative in the fact that it can be self destroying, One of the defining traits of Perfectionism is that it increases the impact of criticism both from within and without Primarily on the subject in question and often goes overboard in the pursuit of perfection creating a depressive spiral. What benefit comes from Perfectionism is based upon the strength and resilience of one's mind and what outside help one has. Perfectionism is really a complex subject and the perception of it as a bad thing comes from the archetypal representation of the subject: That of a controlling figure who hates to be criticized.