The following is an excerpt from my story "The Crossword" from my collection of wedding proposal scenarios, that I haven't translated yet (yeah, shame on me ;-)). So, originally, this speech was written as a wedding proposal, but I think it's also very suitable as a wedding vow. And, of course, it's from Sheldon (I promise I'm trying to find something for Amy, too!)

"Amy, I've always been – and I still am – proud of my brain and the things about it that make it different from other person's brains. But meanwhile I have realized that maybe the biggest and most important function of the human brain, and therefore also of my own brain, is the – luckily widespread – ability of loving somebody. And this realization I owe to you and all the little und great experiences, that we made together. Because of you, I know that I don't have to fight my feelings, that I can allow them and still can be a genius scientist. I don't have to be evil, mean and coldhearted and I don't need to have the wish to rule the world, as the movies and comic books of my childhood, youth and early adolescence have made me believe. I can use my extraordinary intelligence to explore the mysteries of the universe and still I can be a loving husband. Because that's, what I want to be, Amy, your husband."