At first brush that predilection seems like a very good thing. Back over the long millennia that humans were evolving we needed fast energy to escape predators. And we got fast energy from sugars that tasted sweet. The flavor that gave us the most pleasure happened to have a survival value. The question becomes whether other animals taste things the same as we do.
Sheep like to eat grass.
To you and me grass tastes bitter. And bitter is an unpleasant flavor for us. Sheep like the flavor of grass. It could well be that whatever flavor is most beneficial to a species over millions of years will eventually come through the process of natural selection to stimulate the pleasure centers of the brain and to taste sweet. And for that species that flavor of grass will be sweet while it tastes bitter to us.