I'm not a big fan of blurring out all the backgrounds, especially since it seems that you went to the trouble of finding an area that would produce nice backgrounds.
IMHO, a little variety in your backgrounds would allow your customers more choices and may increase your sales.
You need to be a little more careful where you crop your images or frame a little looser and then crop to final dimensions.
#1. You left a lot of head room. A tighter crop would have been a better option.
#2. You included the sole of his shoe, but cut off her foot.
#3. You cut off the man's hand.
#4. You cut off the man's foot.
#5. Normally, it's best not to crop below the knees. In this image you left a lot of head room, but cut off her feet.
For your first try at family photography, I think you did a very nice job. You seem to have put your subjects at ease and their poses and expressions reflect their comfort in working with you.
Except for the colors being off, I doubt that any of these families will notice the things we've suggested for improvement.
Canon 7D, 5D, 35L, 50 f/1.4, 85 f/1.8, 135L, 200L, 10-22, 17-55, 70-300, 100-400L, 500D, 580EX(2).
Sigma 150 macro, 1.4X, 2X, Quantaray 2X, Kenko closeup tubes, Yongnuo YN685(3), Yongnuo YN-622C-TX. Lots of studio stuff.
** Image Editing OK **