#4 is really awkward. I would try some poses that minimize ... uh... their size. I mean, there's no hiding that they're both big, but there are posing techniques that could make them appear smaller.
I think you did a nice job on the pictures, but I agree on the comment on #4. The first one bothers me too. I usually like this of the legs/feet, but his shoes aren't very stylish and her feet aren't really "cute" either.
The last one looks a little like she is going to roll downhill. Maybe its just me, but I think I would straighten it out, even if they were on a hill
I really love #2 the best. They look very happy I also like #3, #5 and #7.
You don't even need creative poses. For example, #5, cropped differently will be more flattering. This should preferably be done in camera. You get rid of her back roll and hide the size of her arm.