The major reason I don't like my sketch is the color. The tone is too dark and muddy. That is a major problem with using markers, you must work light to dark colors. Once that color is down on the paper, that's it. In this case, I was just doodling and experimenting with several new marker colors. Usually, creating a quick color comp or studying a color chart would help prepare for which colors to use.
You can try to paint over and correct a marker color, but my experience is that usually makes a huge mess and ruins the entire image. You could also correct the work in Photoshop or similar programs, But the amount of time it takes for me to clean up an image like this is usually wasted - since re-drawing the image from scratch often improves the overall look and design of the work.
|Example of a self-made color chart, one of many I create for each set of markers I own|
This chart is a small sample grouping of Premiere alcohol markers
Even the line work bothers me. It's too busy or the head is too angled to be truly cute. The most this doodle will ever be used (if ever) for is for some subtle background,
One word of advise: If you are considering to try/use markers, especially alcohol based markers, be aware that is it very costly and hard to maintain a good grouping of colors. A typical marker is said to have a 2-year shelf life. And of course, the colors you use the most for backgrounds or characters will need to be refilled often.