Papayas are good, we put them i mixed fruit salads all the time along with the others mentioned.
Ever try Dragonfruit? I also like Prickly pear fruits especially in jams.
Pretty sure I've had papaya and dragonfruit at some point, but not very often. I think the thing about apples vs more exotic fruits is simply that they keep longer. Mango and the rest I don't buy as routine, I guess, for that reason.