Coconut- I don't think it's the taste so much as the consistency.
Grapefruit- Just appallingly disgusting.
I dispise coconut flavored anything. God that stuff makes me want to puke.
Grapefruit I don't like either. Kind of tastes like puking after eating an orange. Good thing is I'm strictly forbidden to eat it because of the meds I'm on.
Another one I just thought of, Pineapple. I'll eat it if its in a fruit cup because the other fruit usually blend with it. However by itself, no thanks.