Black has its purposes. But aesthetically, it is just not as good, in the opinion, I have observed, of most shoe lovers. And in my own opinion. Perhaps my observation is wrong. Perhaps the great dandies of the day adore black shoes, wear them every chance, and perhaps I have been drinking too much beer. It is on you to go forth and explore this question. I can not persuade you further, it is clear.
I agree with your preference for brown, in general. But I do think some folks get so indoctrinated that they fail to consider black even when it's the best option. A sleek black monk with a silver buckle can be pretty sharp in its own right.