It's funny the trends from around the world, regarding the empty wedding dress, I am in England and every bride I have spoken to isn't keen. It's better when you have a nice hanger and surrounding. Though for me pic 3 would of been perfect if the bride and groom had been in the place of the dress.
Pic 2 confuses me, it isn't the bride, nor does it contain a story, just a slightly different perspective... It's an ok picture, but why is it one of your faves?
Pic 4 is nice.
Pic 5 headless bride and groom shots creep me out, I get the fun part and it's a trend that is going strong.
Pic 6 is desperately crying out for a smaller aperture to bring both eyes in focus, also don't forget to pose the eyes, there is to much of the whites, but that is nit picking, I am sure the couple loved the photo.
Pic 7 is lovely, just less of the vignette, outdoor shots rarely need any vignette, your eyes would automatically have been drawn to the couple without it.
Pic 8 is great visually, but also the symbolism between rocks and commitment.
Your clients will be very pleased, well done.