I loved this reaction the Groom had to a letter written to him by the Bride. He read the letter on the front steps of the house just after getting ready.
The letter contained a name-change application of the Bride indicating that she would be taking the Groom's last name. This was an important part to the Groom and he started tearing up as he read the letter.
I love that my couples' trust me to be able to show emotion. He didn't 'care that I was taking photos. He was being himself and allowed me into his world to experience his joy.