Updated Jan, 23rd 2013
I'm not totally sure what the constraints of the project are but I think the below image of the puppy still constitues a portrait (maybe?). Either way, who doesn't like puppies AND it is kind of like the portrait of DMX in that they both bark.
This photo is of one of my co-workers who I think has a great face for portraits. Very distinct with interesting features.
Portrait of a Pig