As a game asset artist, it's incredibly helpful to have a bunch of presets to be used as a base, before adding finer/custom details.
Having presets that support all current maps such as albedo, normal, roughness, gloss, metallic, specular etc would be so great to get the artist up and running.
Presets such as metals including worn painted metal, rusty metals etc along with fabrics, animal fur, ground, stone, wood and so on.
