lot of extra space on these. while im not against horizontal portraits, i feel they only really work when theres a reason for including the space on the sides. these dont have anything in the background that I would consider landscape worthy, even though the subject is looking off in that direction.
#3 is shot portrait orientation, but i would still crop a lot of that extra space out.
your white balance seems inconsistent in this set. 1 and 2 are fairly warm, and the pictures get cooler as the set goes on.
consistency, especially in sets, is important.
#5 i would toss. not an interesting enough background to be set that far back, power lines are distracting, as is the housing in the background. this would have made a much better, and closer, portrait orientation shot.
I like the color and the posing on these, so a quick WB fix and some cropping would make 1-4 keepers, in my opinion.