I find that pictures you are able to see the reaction of the person, and see what they are doing. And i find with that just that is takes really long to draw a picture. And some times you have to draw numerous of pictures. But with writing you can explain it and read the person's thoughts. And you just have to write it down. and its simple too.
But i dont care which one, i just can't find out how to use anything else but the application paint on my own computer and it looks not as good as the other art application submitted on Deviant art.