Assuming you are American, go to Australia. Experience a new culture and see places you might not have the opportunity to see very often. There are plenty of great places to go in Australia too.
Australia
these sorts of questions are very difficult to answer
as I live in Australia I would choose Hawaii because I have been there love the beaches the people the culture and Florida well hated it those long straight beach strips patrolled by men that should be army sargents the only good thing in Florida is the cuban influence and the mojitos
Florida, as I'm planning to go there anyway to visit the Pan Am archives (and also that Harry Potter park).
Hawaii and Australia are just too far away.
Australia - it's the one of the three that I haven't been to. I used to live in Panama City Beach, FL.