
Not sure what people see in # 6 - The sky is blown and it looks under-exposed to me and what are they looking out into? A tree?
They are looking out into the pro photographer who was taking their picture. Technically the picture isn't perfect, however I think the sky being blown out is somewhat saved by the tree imo. Had it been just an empty space it would look stupid.

The rest have harsh flash with weird hot-spots like you haven't quite yet learnt how to bounce or were just using the pop-up flash I'm afraid.
I didn't use a flash at all, those weird hot spots was the sun shining through the window. Not a lot I could do about that I'm afraid.

Although I do like the one with the little girl - She looks OOF. I can't even tell if that's a Nikon camera or a Canon camera she is holding.
Keep at it though!
It's a Nikon, not sure it matters though. Yes, the picture is rather soft.

The shots that have weird hot spots can be solved with simply not using pop-up flash or any flash at all. The OOF girl can simply be fixed by knowing how to focus properly.
I didn't realize the 400D came without these features. My apologies again.
Once again, no shots were used with a flash. All the hot spots during the ceremony pictures were caused by the sun. I do know how to focus, however when shooting in low light you have to put up with slow shutter speeds. IMO you need a steady hand, even at 1/40 to ensure full sharpness, I guess my hands aren't so steady after 5 glasses of wine.
Thanks to all for the comments, good and bad.