Ask yourself, "do I want to market myself or do I make myself a clone of what other people want?".
You have a unique look, feminine and masculine with the typical mix of youth. Both marketable.
Grab yourself a photographer who can capture the essence of an individual in their portrait work. So far, the images you have displayed in your portfolio are flat, do not accentuate your facial features (where is the shadow?) and have you lost in the scenery.
If you like throwing in some attitude during a shoot, do it...don't imitate what you think people would like. Your current sedentary facial expressions, suggests you trying to imitate a few glamour magazines or poster boards advertisng male deodorant.
You are clearly capable of producing more than one look/facial expression...do it.
..all the best and take advantage of your age and flaunt it.