i've been growing pawpaws for about 20 years here in west pa (north of Pittsburgh)
pawpaws remind people like a lot of things banana, mango , mellon, pear, pineapple, but really taste unique.
each tree (unless grafted) tastes different. the mix of flavors may be more mango (some varieties even use the name) while others favor banana or some other flavor. but they all taste like pawpaw.
Pawpaw are members of the custard apple family. the texture of a pawpaw is custard or pudding like. I tell people "it's banana pudding on a tree" and when they're really ripe, that's a good description.
they ripen like a banana and people may or may not like them depending on degree of ripeness. imagine trying to sell bananas to someone who has never had one and all you had were overripe black bananas.
some people are also turned off by the "pudding like texture" and richness. (who can each a bowl of banana pudding pie filling?)
making things like ice cream, smoothies,pies ,etc allow you to dilute them but still enjoy the flavor.
freezing is the favored way of preserving them,as the pulp freezes well with little loss of flavor. I froze a number of them whole last fall and were giving tastes of them and free seeds to plant at the local Earth Day this past weekend. (about 300 people found about the word "hugelkultur" for the first time also)
I give talks at local fairs promoting pawpaws as the perfect backyard fruit tree, no spraying, little pruning, not bothered by pests, small managable tree for backyards