I am quite fond of the "sketch" type of art in all sorts of artwork, so it is only fitting that I at least give one of the Monday Fun-day themes to sketched wallpapers. Below are some that were drawn in pencil, pen, and even on a computer program. Once, back when I was a student in high school, I took an art class and most of what I made was sketched, haha.
Also, if you pay attention, you Whovians out there can catch a great wallpaper for fans of the series. ;D