Overall I think these a very nice, your posing is creative and your subjects look relaxed.
1- Nice pose, I wish his toes weren't cut off. Either the whole leg in the image or a little closer crop. The shadows are a little harsh, I'm not sure what could have been changed to prevent that, if there were a similar stair location in open shade that might've been better. The addition of a reflector could help soften those shadows as well.
2- Another cute engagement pose. Again, I wish the tips of his fingers weren't cut off. This seems a little cool, the white balance might've been off a bit. You can especially see a blue cast in the highlights. Her shoulder blends into his neck a little bit as well, that's nitpicky on my part but if her shoulder were lower that might help separate them.
3- And yet another cute pose. Watch out for poles growing out of people, the red beam is coming straight out of his head. Could be avoided by repositioning while shooting. There's also something distracting in the bottom right corner, if you have some editing experience you might be able to clone some of it out.
Nice work, flattering portraits. I'm sure your clients are happy with them.
Hope this helps!