And on that note, there's a reason why people like MILK chocolate, because it has sugar, and cocoa butter, and all sorts of other stuff that tastes good. If I want health benefits I'll stop eating chocolate all together, and that probably would be the largest health benefit for me.
But hey if you want some bitter stuff to chew on, go ahead and eat those dark chocolates without much sugar in them.
Good Dark chocolate is far from bitter....key word there...good.