Its looking at FIGHTING and making a style that best fits YOU and YOUR ATTRIBUTES (abilities).
You must consider this scientifically, economy of motion (making a smaller movement rather than a bigger one which is slower and uses up more energy), simplicity (whats the point of learning too much? You should attempt to cover all bases with as little as possible). This way everything that incorporates your style is functional. You must test what works for you and tuning your style by constantly sparring to see what works and what doesnt. Keeps whats useful and discard whats useless.
Cut me Mick!