Your answers should be direct and succinct. Answer the question that is being asked and stay within the confines of the subject being discussed without going off on tangents. Don't be afraid to take a moment to collect your thoughts so you can answer in clear, well thought-out sentences. Give original answers. You will sound more sincere if you avoid overused, trite statements, and describe your general attributes in your own words, followed by specific examples.
Many people exaggerate a bit during an interview.
However, exaggerating or lying to the extent that what you say cannot be substantiated is a sure way to create problems for yourself. The interviewer may ask follow up questions that lead you deeper and deeper into uncharted, unsubstantiated territory, and your statements will probably be more transparent than you realize. Your underlying anxiety also will affect your ability to interview well. If you are hired under false pretenses, your statements could haunt you. You may be expected to follow up on something you said you could do but really cannot, causing embarrassment and damaging your reputation.