A shot can be technically correct and even interesting, but to be portfolio worthy it has to have some emotion, some gesture, some soul, something extra.
These photos above are pretty good shots that follow a lot of the standard photography rules, but don't get me excited once I appreciate the structure of the photo. Barley a story told.
But this shot has a story! And not that great of a shot technically, but gesture and story trump all else in a photo.
Pro tip: Emotion, story and gesture can be strengthened when shooting subjects interacting with each other. I will try this on my next street session.