If you're going to use dithering 100% of the time you use a certain color, such as the skin tone, why not just make the color darker and use a solid shape instead? It would look a lot better in my opinion, don't use dithering unless it's needed. You did pretty good though, it was instantly recognizable.

Markiplier is great! This is great too!

I do feel that the distance between his lips and his nose is a bit too long though, maybe raise his mouth and stubble up a bit? Looking at his actual face, his upper-stubble starts right under the nose, so the gap you have here seems a bit off. Otherwise looks great, I was able to immediately tell it's him. Nice colours too