Only bitterwseet chocolate!
I recommend savoring a Lindt 70% square, with an expresso.
Or if baking, Caillebaut chunks (Whole Foods), at least 65% (in a pinch, 54% will do, but then put in less sugar).
I have never liked food that is very sweet - hate frosting, white choco, fudge, etc...
My son is the same, and my daughter will eat anything.