If you're a formal bureaucratic organization and the candidate comes from a free-wheeling, loosely structured environment, that person may have trouble adjusting. Read resumes in teams. You'll find that different people will focus on different aspects of a resume, whether it's a gap in employment history or the fact that the candidate can speak more than one language. It's a good way of getting multiple perspectives on the same story, and it also enables you to get through more resumes quickly. Avoid decisions based on gut-feeling.
Most people hire out of desperation.
So they hire because they like the person's attitude in the interview. That kind of thinking can force you into a higher percentage of mistakes. The best predictor of how they will do when they come to work for you is to find out how they've done in past situations that most closely resemble your environment. Call a reference during lunch when you're likely to reach their voice mail. Your name has been given as a reference.