#1 is really nicely done, I like that one! It would make a nice canvas. I'm afraid the rest aren't striking a cord with me, though.
I like the concept in #3 but I wish there was fill light to illuminate their faces.
#6 has lovely colors, is a beautiful setting, and is overall nicely composed, I just wish there was something different about the pose. Maybe him picking her up? I dunno, something.. Just my taste, though!