It may be done in Sketchy style (images 1 and 3) or digital Painting (image 2)
I can do someone directly from a picture, or a character from description. (mostly humanoid fictional characters are some of my favourites, so ask away!)
If you want to see the process, I can do it Live (In Picarto.tv) So that you can see. you may also link the stream to anyone you would want an opinion from. As of now, I cannot do private streams (It's very rare for people to come to my streams anyway).