I couldn't possibly pay favorites with my couples but IF I did - Kate and Rob would definitely be at the very tip top of my list. One of the things that is so incredibly important to discuss is being compatible with your photographer. While you might appreciate someone's art - do you actually like them as a person?
You have to really think about the time you're spending in the company of the person behind the camera and how comfortable you are or aren't. For me, Kate and Rob are a perfect example of a couple who I just clicked with and getting to document several phases of their lives already has been so, so amazing for me as a photographer!