The type of paper is not so much dependent on the subject matter, but more so on the intended use/display of the print. If the print will be framed behind glass, consideration must be given to the fact that a high-gloss print surface may cause reflections that will make the image difficult to see. High-gloss paper surfaces do however generally make the image appear "sharper" and more "vibrant", perhaps a good choice for colorful landscapes, architectural, product, etc. photography. Prints that will be handled and passed-around generally benefit from a luster surface as luster will not show fingerprints like a high-gloss paper will. Many portrait/wedding photographers also use luster surface paper because the paper will make the image appear a little "softer" (thereby lessening skin imperfections) and also because the luster surface does not scan well lessening the chance that a client will just scan the proof print and make their own prints rather than ordering prints from the photographer. Matte finish is often a good choice for B&W prints as because of the lack of a "sheen" that glossy or luster papers offer, blacks will appear darker & richer.