Truthfully?

I'd say you need more practice before offering your services. A lot of the photos have backgrounds in them that are distracting, for ecample:

005 Melissa - cupboard door going right down the photo
012 Melissa & Denzel - wastebin and dogbowl in the background

Also, quite a few the subject isn't even looking at you. If the subject in the portrait isn't looking at you them the person viewing the photo can't make eye contact with them either.

034 Courtney - That gate is a big distraction

Half of the job doing portrait photos is looking behind the person

Sorry to sound harsh