Basicly, a portrait made of words. Here's mine of Walt Disney:
Disney_portrait.jpg
Here's the picture I used for reference:
disney.jpg
After I draw a shape with the Pen tool, I wait untill the Type tool has a dashed circle around it instead of the usual rectangle when I want to fill a shape with type, and then I go back and use Font Color to match the type with the coresponding color on the photo.