Originally Posted by Bahamasflyer

What threshold do you define a "blemish"?

Obviously a DUI clearly is one, but I doubt one or two simple traffic tickets would be, on the other hand.

What about someone who failed their initial CFI or PPL checkride 10 yrs ago with no other issues be in that category?

How about someone who's had a completely clean training history and no legal issues, but was asked to resign in lieu of termination at a questionable 135 operator for reasons not having to do with performance or conduct?