I mostly like your second shot, of them embracing with the OOF backdrop and the sunlight streaming in and causing a very nice, complex flare signature...if the framing were a bit lower on them, and there was a bit less top space, it would be a simply marvelous shot! I love the OOF background, with the roof peaks, the back-lighted Japanese maple in red and orange coloration, everything in the background is wonderfully rendered! It's just that their heads are too low in the frame, pulling the frame "down".
I like the low camera placement in shot #3, getting some ground in there, to lead the eye with OOF to the couple and their dog. The flag in the background, and the heavy vignette work pretty well in this case. I like the intimacy shown in the last shot,a cute dual-profile shot! I think it might look better in color.
Looking at 3 and 4, it's interesting to see what a movement of a few feet one way or another makes to the final shot. Eliminating the flag from the background moves the focus in shot #4 to the foreground and them, whereas including the flag and that bit of house in #3 makes it sort of an environmental portrait.
The BEST thing about these is it shows some of the most-ideal ways to deal with direct sunlight! Fantastic job on using the sun almost like a studio flash in a pan reflector!