Welcome to the forum. You asked for C&C, so my 0.02¢...
#1. Hilarious, agree with Bitter Jeweler.
#2. Too close a crop for me.
#3. I would like the trees to be vertical and not slanted, just me again. The bench is a distraction and I would clone it out or change the angle of my shot (next time). The young fellow in the background isn't looking at the camera, not a real problem, but I would have both boys looking at the camera or both not looking at the camera - my thoughts...
#4. Red-eye and a cropped elbow. Again, I am not a fan of the pose when there is no context - if he had been lying on the grass on a bunch of leaves or something, then maybe it would look okay - black background - not my favourite - his hair blends into the background for one thing.
#5. Not bad, but his/her feet and the hand holding the right foot, are out of focus. Overall, the image is not as sharp as the other ones and the hair on the left side seems to blend into the black background.
Remember, these are my comments and represent a personal opinion. If you like the images, then that is really all that counts in the long run.
Cheers,
WesternGuy