There aren't too many, but pretty much for me eating anything that has any tartness gets amplified if you're eating it with something sweet, so like eating a tart fruit with some sweet beverage always makes me sad. =[
All I can think of is cookies + milk. When you dunk the cookie, you get specs of the cookie inside your milk Making it weird looking, then you drinking the milk is just ew ew.
Also spicy food with soda.
I like either or, but it leaves a bitter taste in my mouth with both
And when I have pizza and anything with dairy or coconut water,
worst stomach ache ever