I almost always prefer unstructured candid shots, at our wedding I had requested the photographer take no formal posed shots at all, but he ended up posing us anyway >_< argh, I didn't realise for quite a while as was too freaked out lol .. and I HATE all those photos .. but the ones where we had no idea I like
I think one of the reasons why all of these shots including the posed ones look great is because you know the couple so well, and they are relaxed and happy in your presence. They are lucky to have had you as photographer for their wedding, the photos are brilliant!
I can understand your smitten-ness, she really is lovely. She has an absolutely gorgeous daughter too, who is two weeks younger than my eldest - that how we know each other.
My friends wedding photographer did something similar, I love the idea. I don't think I still have the photograph on my computer, but let me go look real fast. *runs to iPhoto* I do! Their faces are blurred, so I don't feel super bad posting it (I, for the record, did not take this). For their wedding they gave CDs of songs their wedding party thought represented them and I burned them for them, and we got together and I purchased a CD labeling software (well, updated) and we made a bunch of them. This picture (just the hands) was one of the 5 we did. Photography is by far one of the best things ever. OK, I can't upload the file because it's saying its too large... But it was similar, it was focused on the hands and they were blurred in the background.