[agj]

I would definitely agree that to progress with any endeavor -- entrepreneurial or creative -- requires critical analysis of your work and yourself. If you are not focusing on your flaws, then you are likely skipping steps necessary for improvement.

Though, I often find myself at the opposite end of this spectrum. I tend to focus foremost on the flaws in my work, and because of this, I do hate much of my own work and I have dissuaded myself from any further attempts. I would say a certain degree of persistence is equally as important as maintaining a critical point of view.