The Jamaica Cherry (Muntingia calabura) is perhaps the most ideal containerized tropical fruit I've grown, except that I wasn't impressed with the taste of the fruit. But for precociousness, ease of culture, the ability to fruit almost non-stop throughout the year (at least when given constant lighting and warmth conditions), as well as being a fairly attractive plant and being able to easily keep it small, it seems like a very impressive container plant. Sapodilla is a close second for all the same reasons, but again I wasn't impressed with the taste of the fruit- sweet, but unremarkable.
If I had an acre in Florida, I'd plant several of each. I only have room for a few plants, so they've been given away-- my plant-growing addiction forces me to try new things and something has to go. I think a Garcinia might be next on the list to try, but still debating on which-- not sure I'm willing to wait for a mangostana to mature, but it is the only one I've tasted (and am sure I need more of) so far.
Miracle fruit are my current favorite tropical fruit for containerized growing. True, they don't taste like much- but their effect is incredible. They are a little more challenging to grow ideally, requiring acidic, ultra-tropical conditions to thrive -- but so far they have been attractive, easily-dwarfed, almost continuously bearing, relatively pest free (had a minor issue with scale when not treating the plants well...), and they are very fragrant when in bloom, almost like a citrus tree. I tortured my original plant through 5 years of low humidity from a seedling, and it still managed to bloom and bear fruit eventually, while still in an 8-inch pot. Miracle fruit are also completely unavailable in stores or farmers markets where I live, even in some pitiful, unripe form. And although freeze-dried tablets can be obtained, the effect is nothing like a fresh fruit.
Kevin