The pictures now are much sharper and more emphasis on the model. The ones with the trees are good. However, the last two has too much background distraction especially the metal post.

Try to set shutter speed to between 4 to 6 seconds. Lower your ISO and use smaller aperture like f16 or f22. Like skarn said, be wary of the smoke from the fireworks and also the wind direction.

Lens flare on the first picture. If you have a CPL or ND filter during that time would have made the pictures even better.

They are nice nonetheless.