These all are very good. I think the more balanced (less shadow) lighting of the girl work better.
#1 is really nice and soft lighting and works really well.
#2 works well. Like the harsher lighting on the male.
#3 like the high key, but if asked to be "picky" would have prefered less shadow on the second eye.
#4 very joyful. Prefer #1, but I do like the vignetting.
#5 I think I just prefer the more serious look and harsher light/tones in #2.
#6 and #7 : Prefer the softer pictures above, but it does depend on what look you are going for.
But I have no authority on portraits, just think I know what I like

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