I am noticing a lot of requests for "a 2x2 picture" or a "passport picture". I know they want to put a face to a name and application, but what should I be submitting. Obviously not a picture of me at a bar holding up a drink... Should I be wearing a suit, is this a headshot type deal? Should I be smiling or not smiling, but not looking gloomy? Should it be casual or formal or in between? Does it matter? Any inputs from those in the know? =]