I like the last one better than the first two. The first two have an overall slightly out of focus quality. There are parts that are focused, but not the parts of the picture that I feel should be.
For instance, the first picture the white stitching on the front of the hat is in focus, and by the time you get back to her right eye (on the left side of the picture) it isnt quite tack sharp in focus anymore and has barely started to get blurry. Minor detail, but distracting nonetheless.
In the 2nd picture, her eyes arent the focus either, which has the same effect of not really drawing your eyes into hers. If anything, I'm focusing onto her shoulder or zipper on her jacket.
I like the last one. Her left eye (photo's right side) is out of focus enough that it looks like that is the intent, so it isnt annoying to look at. My only critique on that one is that I'd like to see a light in the upper right of the picture, giving her a little shadow to her right cheek, making it a little more visible. Right now, her head just kind of merges into her neck. Maybe that's the effect you were going for, if you were, then great
All in all, very nice. Most parents would probably be quite happy with what you've produced, especially since it's just friends and family.