Yeah Paul, it's amazing how they are all different. I just watched Richard's from grafting df do a taste test and he said it reminded him of yellow kiwi, I can see what he means.
I think Purple Haze, Delight, Physical Graffiti, Dark Star, Cosmic Charlie and Haley's Comet all came from the same fruit's seeds. I made a Ninja Creami with red dragonfruit and it turned out alright, good colour but a quite mild taste.