Looking back on it, I am not sure what I was thinking, but it worked out well I guess. My picture was just a nice picture of me in Hawaii. I had my hair down, and I may even have had a flower in it. It's one of my favorite pictures, and I figured it gave me some personality. I hate passport photos, they always look like crap!
So, I would advise you to use a tasteful picture that you like of yourself, as long as it shows about as much/is as zoomed in as a passport photo.