I find that there are simply too many posed shots that hardly any candid. I hardly shared the joy of the couple nor the family and friends. The first photo itself and few others are underexposed and obvious handshake in others.
Anyway there's always a first time and continue to shoot more to gain more exposure!
One more thing. You also failed in the traditional style of framing your subjects. God gave us hands. Hope u understand what I mean. If not sure, go library search for books on portraiture.
I find the colors in the photos are not vibrant. And exposure seems under, likely because of low level of indoor lighting. If using an SLR I think the flexibility of control on the SLR wasn't fully utilized. Perhaps you can compare it with others who also took photos that day using a normal point-n-shoot camera.
"...not taking what one doesn't desire is the hardest thing in the world" - Albert Camus