The Corporate Ladder

You get a call the next day from the company and they set up an interview with you.

The day of the interview you arrive promptly, wearing your best suit.
The interview itself goes very well, and your potential boss is impressed with your attitude and charmed by your personality. You repeat the harmless lies from your resume, and everything seems to be going very well.

The final question your interviewer asks is "tell me one negative thing about yourself."

You immediately remember your previous employers complaints about your chronic tardiness. Should you try to impress your interviewer with your honesty or is it safer to keep this personality flaw to yourself?