Do yourself a favor: if you plan to keep shooting weddings, buy at least one faster lens. f3.5 just doesn't cut it for this type of work, especially with these very busy backgrounds and foregrounds. Image 3 is a great example: at f1.8 or bigger, the couple would be in focus but the grass and party would blend out and you wouldn't care so much that there's a blade of grass going right through the bridesmaid's face. At f5, it should be culled out in my opinion.
Aside from that, I agree with the above comment about the vignette. I add vignette all the time to portrait work but these are all obvious and overdone. It shouldn't be use on every single image.
I feel like all of them would pop more with some extra time editing. The colors are flat - it was obviously a rainy, overcast day - but you can bump clarity, vibrance, contrast, etc. to help out.