When it comes to commissions, I let peeps choose how they want it. The fancier stuff requires moar payment. My commission sheet needs to be updated for the coming year...
When it's personal works or collabs though, it depends on what the picture is. If there's a BG, the characters will have black outlines with colored inlines, to help them stand out from the background. Otherwise everything is colored x3.
Link
Machu
I really like the style of this :D