For me that is corn. I really can't abide it. Even one stray ear in my dinner puts me right off eating. I have no real idea why. I just find the taste and smell revolting.
Yet otherwise, I happily eat all sorts of strange things. Here in China, they like to ram corn into everything, even when I specifically ask them not to. I mean they even have corn ice-cream. If that's the peak of 6,000 years of civilisation, I give up!