Im no expert, but I would be happy with them!
And since you want to know what I think of them here goes:
1. The guy in the kilt takes up 50% of the photo, I think if he was either a) out of the shot or possibly further on the right hand side and didnt take too much space in the photo, It would have bee a nice shot..
2. I would have liked to have seen the bride and groom in this shot, or more of them if it wasnt possible to fit them in completely.
3. Is the one I like most, but a steeper angle would've made it for me.
4. Seems a little imbalanced as they're mostly positioned on the left handside of the frame. If they were centred would be lovely.
5. Theres that one leaf that needs to be cloned out at the top...
6. The little girls head seems to have hit the frame.
I hope you dont take this the wrong way, but this is my views and opinion. I cant speak for everyone else, and am not a professional.
I cant stress enough, that if these were my photo's I would be very happy with them none the less..
Congratulations to your brother and your very first wedding gig.