Mr Moustache went through a large amount of changes. All are fun. I was asked for an impressionistic view of the model, then a more realistic version, then a more photographic version, then a change of background. Some changes are interesting from what the eye and brain makes you do, the earlier versions have features that are far bigger than in the original photo. I’ve tried to keep the look of love in the sitter’s eye throughout.
The final version.
Notice the subtle use of colour to make the image 3D. The blue or red lines, the underlying grey blue, the use of the canvas, with colour skimmed over the top.
Trevor Mill Graphic Designer Ltd 
Awesome, and great to see a bit of your process as well
I love showing people how it’s done, so they might do something themselves.