First one's awesome.
Second, good call, but the effect is lost because it's just too blurry in the forground.
I understand what you were going for, but it's just "mush" looking.
Third...um. Well we can see they're slightly large as a couple. So the challenge is to make them look beautiful and happy. My eye goes to her waistline and the exposed skin. (I'm a guy, what can I say). It might be better a little brighter.
Fourth is good. Nice angle.
Fifth has potential. But with her leaning like that, and her shoulders closed it makes her appear large. Imagine her back straight, her sholder slightly out, and him leaning into her. Always cater to the girls figure, for the most part.
Sixth is akward because her elbow is cocked funny, her eyes are darkened in the shadows, and her face is overexposed.
The last one is a good one. Great use of space, lighting is good.