#1 The overall composition might be improved by moving in a bit closer to the subjects to make them a more important part of the photo.
I find their faces are both over exposed and blurry, with a serious lack of detail. Not good
#2 Nice shot and good composition. There is too much space in back of the subject / you centered him too much in the frame
#3 Probably the strongest of the 3 images, however I feel you are too far away from them. Keeping the same composition, zooming in / closing the distance again would of made them a more important part of the photo, they are too small as is.