Hm, I think a lot of people (not just woc) are wearing pigments with bases and mediums in the eye area because they can look completely different without them. I do either just a base or a base + medium.
Other than that sometimes my medium is nailpolish if I want to wear them on my nails (try Chocolate brown with a black nailpolish).
The only time I don't wear a medium is if I wear it on my cheek (Frozen White for example, but I hear a lot of people like to wear Vanilla on their cheeks).
I do like wearing pigments as lip colors too. To do this you have to use a medium or a base -> Lipgloss, lipstick. (Try rose with clear gloss)