Hi P. -
I grew up in South Florida so I know what you mean - the people in DC are much, much nicer.
That said, I moved from several years in SW Virginia and then several in DC back to Miami - Doral specifically. Awful, they use their cars to run over ducks on purpose!!! My husband and I moved out of Miami-Dade as fast as we could and bought a house in Cooper City, FL. Cooper City is a small "town" in suburbia. About 10K residents, very much small town feel. However, the whole place is sprawling and I am not sure where your husband is thinking of for a residency...and that will make a difference. If he is thinking UM or Jackson, living up near Fort Lauderdale is a heck of a commute.
Personally, I think people are a bit nicer on the west coast of FL and further north. But, I now live in downtown Fort Lauderdale and am happy for the most part. I don't commute (my office is 1 stop sign away) and my children's school is 3 blocks - we walk there.
I do like my clients and my colleagues. So does my husband. I will NOT work in Miami again nor will I live there.
Feel free to ask more specific questions. C.