Again a matter of opinions and preferences.
In black & white, particularly those done traditionally, most prefer glossy. You will hardly find exhibition grade prints or art works in matt.
The reason is that matt surface scatters light, and do not give a brilliance to the image. Another very important reason is that with the matt surface, blacks are not black and whites not white, reducing tonal range.
There are some who prefer a matt print, mainly for conveying certain moods.
But in general, for black & white traditional prints, glossy is the norm and prefered surface.