C&C per req:
1. Excellent colour and exposure on the subjects, and good foreground/background exposure balance. The posing isn't bad, but it could have used a lot of finesse. Dad is leaning into the group, and so is son. I like the fact that you've got a 'V' based on their height, but I wish there'd been a bit more attention paid to the details; the fact that their hands are all different seems a bit 'messy' to me, and I would have liked to have seen their scarves arranged similarily. I would suggest cropping a good bit off each size; brown, empty forest doesn't really add to the image.
2. Very nice; I like the fact their both leaning in, and your DoF is perfect on this. I wish however you'd arranged their scarves a little better and had brought in a reflector to get some catchlights; their eyes are quite dark.
3. This really need to have been shot in the vertical ("Portrait") orientation, and I would suggest cropping it that way. Shooting vertical would have give you more room at the bottom, below Dad's hand which is uncomfortably close to the bottom of the frame. Again, I would like to have seen them standing straight rather than leaning in this way. In #2, the lean has an artistic appeal, here it just looks like their slouching. You've also got some reflection in Dad's glasses. Chances are if he'd moved them down just a bit on his nose, raised or lowered or turned his head just a hair that would have vanished.
4, 5. Pretty much exactly as per #1.
6. Again, the leaning in this way doesn't really work, but if you are going to have subjects touch heads, tell them NOT to lean against other, but literally just touch. Also, try and get a little more symmetry in the hand/arm placement.
Overall they're a nice set, with just some thoughts for future improvement.
Just my $00.02 worth - YMMV
~John