My story:
I am the oldest son of a family of 8 kids. (No, we are neither Catholic or Mormon). My Parents adopted my older sister via a legal service. I came to my parents through The Childrens Home Society. My younger sister, and two brothers were later adopted through legal means. All of us were adopted as infants. My parents then were able to have two children of their own (this is pre IVF, at in late 30's so miracle babies to say the least). They capped it all off by adopting a Korean girl, a second adoption since the first one did not go as planned with her originally assigned family. This sister was 8-9 at the time of the adoption. Quite an age/gender spread to say the least.
I can't ever recall a single time that any of my brothers or sisters thought they were anything less than blood relatives, even though we were all told early on how we were brought into the family through adoption. My parents gave us all the love and support they could muster, given how thinly streched they had to be what with so many kids at the time. I have Soylent Yellow and Soylent Blue, both teenagers and that's a handful. It's tough to imagine having 5-6 teenagers of both sexes all at once to shepherd!
Every one of us has wondered "Why was I given up?" or "What is my background?" and anyone reading this and thinking of adopting should plan on answering these questions with depth and honesty. They are mere questions born out of the curious nature of an adoption and rarely anything more. My parents are my parents. All 6 out of our 8 would say the same. Having met my Birthmother, she was able to fill in many of the other questions that I had, but in all honesty, that was all that came out of our meeting. She had her life, I have mine. It's highly likely that our reunification mended an important part of her worldview. Reunification should also be considered when adopting, IE "How much access should I give my child to birth family data?" or "what happens if the birth parents try to re-connect?". In the end even after meeting one half of my birth line, as said before, my parents remain my parents. There is no changing that line in the sand for me, ever.
To adopt or not is an extraordinary question to solve. Even though I've been adopted, I can't say myself if I'd be able to adopt if we weren't able to have kids on our own. Give Childrens Home Society a ring and see what resource they have to help answer the question. Another person I recommend on the subject is a Redfin Realtor, Karl Stenske. Karl has an extensive background on adoption issues and a servants heart on the subject. Anyone reading can PM me with questions as well if you prefer.
My .02c
Soylent Green Is People.