#4 is by far my favorite. I really like the expression, the smile, it looks authentic (not posed) and I like the light, I like the B&W. I might clone out that bright one spot on the left side of the pic. I'd clone or crop out whatever that is in the bottom left corner too (bottle of dish soap?). The color version looks rough, was there some strong green reflections in the room? There is way to much green on the child's top right face.
The 1st one is pretty good. I would probably crop it down a bit lower and just get rid of that stripe of sky but I could see why you'd want to keep it in there (personal preference).
#2 might be my least favorite. I don't like the tree on the left, I don't like the horizon intersecting the middle of her head. Sounds like some like it so maybe another personal preference sort of thing.
#3 the background looks wild and distracting. The expression is "OK". I'd look for a more pleasing background.
#5 I struggle with because of the light. I don't really like that large shadow going across the woman's face. You probably would've been better off just shooting them backlight with you facing the sun (kind of like #2), just aim for pleasing backdrop of the water.