The OP's criteria may need revision:
Sailing with "5' to 6'" draft eliminates a lot of Florida. You do still have Punta Gorda, the keys and St.John's River as per
@PaulK. You could not pay me to live in the keys - the traffic is horrible in season.
"Not super touristy" would eliminate Key West and St Augustine. St. Augustine has a terrible traffic bottleneck (As does Naples).
Nice golf courses are pretty much anywhere in Florida.
Active sailing clubs? This one is tough. There are tons of "Yacht Clubs" around but many, if not most, are social organizations. Our local "Sailing Club", which is nationally recognized focuses on youth programs. Being on the Indian River Lagoon forces them to sail centerboard boats or catamarans. Another local club sails keel boats on the St. Lucie River and does host events but the turnout is 10 or so boats. Racing a keel boat on the St. Lucie River reminds me of turning a golf cart around in a tunnel.
I would rate local heath care as "Fair." I haven't been able to discern if it isn't better due to the quality of the providers, the consultation of private practices into large companies, or if it's because I transferred to Medicare shortly after moving here. It feels like fake medicine to me and the communication with Dr.'s offices is terrible.
Take a look at insurance rates before buying. Both auto and home owners are going to be much higher than you anticipate. In some cases with homeowners the insurer of last resort is the state $$$.
It was cold this winter! Even friends who visited from up North were surprised that the weather was as cool as it was. It was pretty windy too. When the "Northers" come it isn't beach weather - maybe not even golf.
One thing I like about where we live is that everyone is from somewhere else. A native Floridian is hard to find. This phenomenon makes the social climate positive. Most folks are looking for others to interact with.
I'm sorry this post reads negative. We were retirement shopping about 10 years ago and tried several areas of Florida, North Carolina and Virginia. I'm just relating some our observations. Florida's attractions are plentiful. But it's not all positive.