I don't think there is a correct answer for this question seeing as everybody is different and has different skills and strengths they could bring to a dental program. So try to think of something unique about yourself that also ties into your strengths and desire to be a dentist. I really enjoy community service and I want to use dentistry to help those in impoverished communities, so in my interviews I end up talking a lot about the community service I've done and what I want to do in the future , so I would probably mention something like that. But since interviews are conversations, I think its best not to prepare cookie cutter responses. Its good to have an idea of the points and topics you want to highlight about yourself, but make sure you can bring them up in the context of conversation. My interview at UF was very conversational, so I think it was good that I didn't plan my responses down to a tee, because the way they asked questions was a lot different than I expected. Best of luck!