I have heard of all of those towns. I used to work in the direct mail facility in Rockland to which was a branch of a company that used to be known as Target Marketing which sent out packets of advertising to each household in Maine each week. Each packet always included a Rite-Aide flyer. I'm sure that you have probably received them too.
Actually, I moved to Maine from Florida with my late second wife who wanted to be close to her elderly parents. She was in serious declining health due to psoriatic arthritis and other serious medical issues. Besides working full time I was her caregiver too. In the end it was too much as I could not really take care of her properly. She spent the last 1 1/2 years of her life in a nursing home but I would visit her regularly. One day she died suddenly. A week later I resigned my position and got on a bus to Orlando. Her mom had died a month before and her dad died 3 years earlier. It was a horrific 8 years.
You are right about people in Florida being generally not being friendly. One reason for this is Florida is a cosmopolitan state with many people from many different cultures, tradition and religion. I also believe that if you live in or around a big city you can get seriously stressed out due to the traffic, crime, and millions of people crowding you. The non-stop police sirens don't promote friendliness either.
I don't like the heat either but can't stand Michigan and Maine winters anymore as they last too long and too cold.