Perfectionism vs. Value

I see perfectionism as a behavior driven by two motivations: A) The desire to go from competent developer to an expert one. B) The desire to avoid the shame of failure.

In the case of A, I think its often good for the developer / bad for the product. By single-mindedly erasing imperfections, the developer learns the nuances needed to move from competence to expertise. I don't think the product is likely to benefit at the same rate, though.