When it's best to lie on a job interview and these all happen to me, number three was a real doozy. Number one, when the real reason you're leaving your job can't stand your boss. Number two, when the real reason you're leaving your job is because the job boards you to tears. Number three, when the real reason you're leaving your job is your boss is having an affair with someone in the office, that is if negatively impacting how you and your staff are treated and neither of your boss's boss or HR wants to address the situation. While these are certainly good reasons for wanting to leave a job, it's not a good look for you to give any of these as a reason on a job interview. So what can you say? I want a job with better career growth opportunities. Keep it short and positive. More things to never say on an interview using the link below.