I rated myself as a B. I occasionally will get something like Cupassu and try to grow it out in SoCal. It usually ends up in dead plant, so now I take smaller risks. I am aiming for rarer tasty fruits and decent yields in containers, that can be grown outside with minimal extra protection.
Things like Opuntia sp., prickly pears I view as rare (in the stores), tasty and productive. I like trying experimental things, like Marula in containers as well. Also got a good collection of sub tropical fruits like guavas, mangoes, bananas, etc. I don't worry about these unless the temps start lowering past the high 30s.
I like growing tasty things adapted to the climate as well like; olives, pomegranates, figs, etc. I find these pretty much indestructible.