Bride and groom alone before the ceremony
I think that this is, by far, my favourite photo of the wedding day.
I believe that the only chance to experience this moment again (or at least 1% of the intensity of emotions of the big day) is to have a photograph of that moment. To get the best picture you will need a moment alone, reflecting on your feelings. Step outside, or ask everyone (except the photographer, of course) to leave the room and reflect on your emotions.
Bride/ groom with parents and siblings
Bride and groom leaving the ceremony site