Finally you need to think about your expression for the photograph. Here again you are slightly more limited if the passport photo is to be used in a professional capacity. You will find for example that you are not allowed to smile in a professional passport photo. This contributes a lot to so many bad passport photos in which we look overly intense, angry, upset or blank. The truth is though, that even in a professional passport photo, you can normally still get away with smiling slightly or just looking fractionally amused. Don't pull a massive grin, but just inject a little life behind your smile. The rest is behind the eyes and by smiling with your eyes you can look alive and as though you have a twinkle in your eye rather than causing people to question if you might be a zombie. Remember it doesn't hurt to practice this look in a mirror, so try a few and pick one that will be suitable for a passport photo but that you still like.