C&C per request:
As a first engagement shoot it's not bad, and I suspect they're happy with the result. I do have some general suggestions...
- I'm guessing (because their hats were coordinated) that the hats have some significance to the couple. However, without judiciously applied fill flash or a reflector, you get shadowing of the eyes which takes away from their connection with the viewer. Personally I like to see engagement photos in which the couple are locked on each other and not interacting with the camera, but if they are going to look at the camera you want to catch their eyes.
- These are framed pretty tightly. Particularly in the first and fourth, if these are printed for framing the frame is likely going to obscure some of their heads.
- I like where you were going with the shallow depth of focus on the fourth, but a) the pose (sticking her arm straight out) looks uncomfortable, and b) the ring is still such a small portion of the frame that it doesn't have the impact you were going for. A tweak to this pose would be to have his arm out as well, supporting her hand (think of the extended arms of a ballroom dancing couple). You could also have brought the arm in for a more comfortable position, and gotten in much closer to the ring - it would be a bigger portion of the frame and you still would have a shallow DoF to blur their faces.
- The handwritten note on the rough-edged brown paper is unorthodox, but I kind of like it.
Just my $.02.