I am technically a middle child... older brother and younger sister. But, I and my brother were both adopted.. me first at 6 days old and then him when I was about 2 (he was almost 5). I can remember when I was younger having a hard time figuring out why I wasn't the oldest since I was there first. Then my brother moved away when I was 12 and I had hardly any contact with him until a few years ago so I guess I've felt like the oldest for a while.
No wonder I'm all screwed up... lol.