They may possibly be a sales rep who was recruited by a competitor. You need to write down six to eight characteristics and duties that a winner at your job will do. In any position, there are six to eight factors that separate winners from losers. Don't get drowned by the details. Determine which six to eight they are and then look for them.
Most managers interview over and over and dread the process.
But you should always be looking. As winners get harder to find, you need to stay on the lookout for those with other companies who fit the model you want. You can grow a person from scratch from another industry or pay more for someone who has a proven success with their existing company. It depends on how good your training is and how much you can pay. But judging personality and sales skills will never be a problem for you again.