Joe,
I'm on both sides of that question. I hire 3rd party inspection agencies to inspect my work as I am prohibited from doing so. The ones I don't hire again are the ones that aren't thorough. After all, I'm relyiing on them to ensure that I didn't make any errors of commission or omission.
I have personally lost business as an inspector because I insist that electricians comply with all the requirements of the NEC. I may cut a homeowner a little slack, but if you're doing it for $$$, you should do it right, including all the "minor" things.
I'm fortunate that I do not have to rely on the income I make from inspecting, so I really don't care if I do lose business. I do sympathize with those inspectors that get into this situation, since they end up taking on liability for themsilves or their agency by not enforcing all parts of the code.
Tom