I like the contemplative mood of this image, achieved through the use of Scrape to modify the features, and muted color and side lighting for a soft mood.
I started with this image that I created previously. You can see how I created it here.
In iColorama, I used Effect/Scrape preset one to produce this image. I experimented with all the sliders.
In Brush/Colorize, I painted with several of the presets at various opacities, applying after each one and then going back to Brush/Colorize to use another preset. Depending on the preset and choice of brush, you can get different effects, such as the textured effect I got using white paint and a Pen brush. You might also want to experiment with the brush settings under Set.
Still in Brush/Colorized, I painted on color at low opacity.
To punch up the colors a bit, I applied Adjust/EQ preset 2 at medium opacity. This also helps to bring out some of the texture that had been hidden in the coloring step.