CC can sound harsh, but that's what CC is - the intention is to help others improve, so if you even think something could be improved, point it out. If you are looking to improve, there is no such thing as "negative" feedback. If people are commenting on your photo in a meaningful way, that means you have an interesting photo to begin with. Well, unless everyone is posting stuff like "omg this is bad", "you suck!" or "I CAN'T LOOK AT IT I BROKE MY MONITOR!!" :mrgreen:
That said, nice photos overall, here is my CC:
First one, your subject (the family) looks off-center because of the empty space to the right. The background also feels wrong, imo it should have been a bit darker and further back.
Second pic, the lighting is too harsh. You probably needed some diffusing. reflecting, and filling-in to do there but i don't know much about that. Another thing, you could have picked a slightly different angle if possible, so the mother's head would be against the same, light coloured, background as the father's.
Next three photos, i like the middle one, nice skin tones that work well against the dark bg. Partial desaturation is up to taste i guess, but on the second B&W one the children look a bit... dead!

I think you should have let the colour in their eyes.
Last pic, a darker background would really go a long way. I like the composition, what the kids are doing, and the colours, it is just the bg that spoils that one for me.
Here is a
really quick edit (sorry about the quality really!):
edit - sorry looking at it again it looks terrible, i promise to do another version later, but well, it shows what i mean!