I won't say which airline I fly for, but I'll just mention that I fly a 1900 and we have a somewhat controversial training program. We had this guy in training with the mental capacity and maturity of an orangatan (seriously, I think he may have been mildly retarded.) He had numerous problems in training, a poor attitude, and terrible hygiene. In training, he once moved his hand from the left prop lever to the right one (after he'd confimed the left one was the failed side) and feathered the good engine. People who'd known him in primary training said he'd failed every check ride to date at least once. He managed to pass the airline's rides, but failed the oral walkaround exam after he confidently told the check airman that the generator produced 3,000 volts and was located somewhere in the wing (belt drive, maybe?) The best moment, however, was when he flew home and attended a wedding in his uniform. He now flies for Pinnacle.