I've been on my tiny water color heads kick again lately. I am still trying to get a handle on what works best for me, paper and media wise. I find that with watercolor, the details get a bit softened, with gouache, there can be an overall grainy look. I tried acrylic washes last night (lower right) and I like the way it holds the detail and still has a soft-ish clean look.
For all of these I am working from magazine photos or old hollywood bw photos which have good directional lighting.