Yeah, that question was on my UPENN app too. I said that I was really hyped about the 6 figure salary (what I liked most), and that I couldn't stand people very much (what I dislike about dentistry). They didn't even give me an interview. No one appreciates candid honesty anymore.
So...teethmonkey, last week you wanted everyone to tell you what schools to apply to, and now you want us to hold your hand in filling out your applications. Pretend you have a brain, and some initiative to do things on your own!! If you need others to tell you what you like about the profession you are trying to get into, you really need to find a contingent career option in your life. It's honestly too bad that your grades are as good as they are, because after plagiarizing everyone else's personal statements and committing every interview question to memory - you will probably get in somewhere.