Thanks so much for your nice comment!
I am liking your portraits with scribbles! Do you sketch them out first in pencil, as a guide? You must, because your placement of features is so accurate. Plus mixing the different pen colors to get the final shade you want is both fun and challenging. I once tried it with colored ink and a steel nibbed pen, using straight cross hatching lines of different colors to get the shade I wanted. And always leaving some of the paper showing through.