WHY DO YOU SHOOT EVERYTHING HORIZONTAL; AREN’T HEADSHOTS SUPPOSED TO BE IN PORTRAIT ORIENTATION?
Again, this is a stylized choice to maximize the marketability of your headshot.
Portraits have been done in vertical format long before the camera was even invented and it originally made sense that headshots would follow suit. Now, however, much of that has changed. Our TVs have gotten wider, our computer monitors look more like movie screens now, interviews are done in this format, commercials use this format and the list goes on and on. Nearly every time we see a face on an electronic medium these days it is set in a horizontal format.
It would be a waste to not embrace these same formats for your headshot.