The main purpose of the profile is to convey information. Some of this is just biographical, such as how old you are, your ethnic background, your education, etc. Some information involves your beliefs and world views. Where are you coming from? What type of family do you envision? What do you want to give your child? What do you believe?
Don't try to pull emotional strings. The birth mother is trying to make an intelligent choice for her child. She needs real information to do this.
Because this information needs to be approached systematically, it is best to either use subtitles for paragraphs or to put the information in question and answer form. Some people use one format for both adoptive parents, and use the word "we" when appropriate, and some use the names of each, such as "John was born in. . ." and "Susan went to college at. . ." when referring to distinctions. Others separate all material so that each adoptive parent fills out his and her own section. Any such approach is acceptble, as long as it is clear. You are not writing a novel, so you do not want it to be lengthy. At the same time, however, you should avoid one or two sentence answers, It is difficult but important balance to reach.