We have all heard this question in a job interview, either when interviewing for a job as the candidate or we have asked it as the interviewer. Indeed, "what's your biggest weakness?" or sometimes, "what are THREE of your biggest weaknesses?" is still one of the most commonly asked questions in job interviews. It is so common that many recruiters and hiring managers just keep asking it in the interviews without ever stopping to think of its purpose.
Have you ever interviewed someone who seemed like the perfect fit for the job on paper but during the interview, you just didn't have the "feeling" with them? Maybe the candidate did everything right during the hiring process but your gut was telling you that something was off?