There are some great looking shots here..the difference between shooting MX and weddings, though, I think, is the fact that you're looking for emotional content instead of absolute sharpness. In the last photo, for example, I would've shot it wide open to blur out some of the background so that the focus is more on the bride - you don't really need the fine detail of the bushes and trees.
#4 and #6 are also a tad overexposed - there is a loss of the detail in the bride's dress, as it looks like there are large areas of "just white." You may have tried, instead, to meter off the dress or shot manually.
Just a couple of technical details. Otherwise, these shots are great, especially for a first!