I have a lot of difficulty making a character without an image to use for their appearance. Besides the concept, finding a suitable image will be one of the first things I do. The problem with this is that I'm extremely particular with what the image must be, but at the same time not sure what it is until I see it. This results in large amounts of time spent looking for that one image. Simply because there are more images of attractive people on the internet, it is more likely that a given character of mine will be attractive than unattractive.