I spent a lot of time thinking about Satine's costume when I wrote Grace and Glory, and I came out of it with an unexpected appreciation for it and her visual style in general - especially when I started sketching it. It's just so much fun to draw and paint. It's very elegant and dramatic, I love all the angles.
I picked up gouache very recently and I'm enjoying it quite a bit, although I suspect I'm doing it all wrong. I like that it's more permissive than watercolors, that I can go over a part multiple times before it gets hopelessly muddy.
This painting has fairly realistic skin colors, but I enjoy using stylized colors for humans and gouache works great for that:
I'd like to try this in fanart as well. It's a bit of a fight, though, when you're trying to get the likeness and keep to a color palette at the same time. (You'd think it wouldn't be so hard, given that "color palette" in trad media mean a literal palette, but alas.)