I am planning to sell some vector images in other host websites within this month. The image below was colored by using sharp-edged highlights and shadows. Although this one was not done using vectors, it has the right coloring style to practice and simulate making a vector image.
I believe one essential thing that we need to consider when illustrating is versatility. What i mean is that we must have the ability to adjust to any drawing or coloring style and not just settling down to our comfort zones. Having our own trademark style is good but adding one or more style is better. Just remember, there are vast sources of talents out there who are looking for jobs. If you are looking forward to earning some money with your artworks, then you must have the skills to compete. And then you will need that versatility.