I don't think it's any different than enjoying vanilla ice cream over rocky road...we like what we like simple as that....if our ancestors liked a certain flavor that doesn't dictate that we will like it as well but we might...if we grew up only ever tasting rocky road then the taste of vanilla might leave us bored, an acquired taste.

For me personally I grew up only tasting vanilla, and I was always bored with it, one day I got a taste of the rocky road and wow!!! Definitely nature for me...btw, my childhood would be what is considered very normal.