If those are my only choices, I'd go with Hawaii.
If I'm retiring, I'd feel like I'm too old/lazy to learn a new language. Florida never appealed to me at all. And I suspect Hawaii (where I've been) has many of the positive aspects of Tahiti (where I haven't), but keeps me both in the US and somewhere that I can travel to the rest of the world more easily.
Probably Maui, though perhaps Kauai.
But I have no problem moving where I don't know people. Santa Fe, NM and Sedona, AZ are at the top of my current list, and I know no one there. I can meet people.