[Porsche-O-Phile]

In Florida I’d probably recommend a semi-gloss with primer. Anti-microbial wouldn’t hurt either. The climate there (like here) is warm and can get humid so it’s easy to grow not-so-nice stuff, particularly at inside corners. You want things easy to clean and durable.

I’ve seen issues with unprimed painted surfaces developing bubbles under the paint and causing delamination - the substrate absorbs moisture and then it gets trapped under a moisture-impermeable film of paint. I’d suggest drying the substrate (cement board? mold-resistant gyp?) well before priming and painting (run the AC for a day or two).

I personally like Dunn-Edwards and Benjamin Moore but pretty much all manufacturers make pretty good stuff these days. Hard to go wrong with proper prep.