A short summary of birth order descriptions here and here.
Well, long story short, I wonder how many people fit into these descriptions.
Personally, I am the middle child of three children. Some of the traits apply to me but probably not because I'm the middle child. I am definitely secretive; I don't tell anyone anything sensitive or important to me unless it's anonymous. I don't think I developed this trait because I didn't get enough attention from my parents though. Rather, it's probably because I didn't have any friends for my first 5 years of school. Because of this, I also lack the social awareness to be a peacemaker and the like. Unlike the descriptions, I get the most attention in the family. My older brother was already in high school (and entering the 'never-there-to-talk-to-parents' stage) by the time I started pining for attention, so I got a fair share of love. My little sister grew up rather bratty, so I was also praised more for being "obedient".
I am most definitely off of the description!



but I'd say especially as a kid/teenager, I was always very responsible) and I was always the kid who ended up talking to my friends parents more than my friends. 
I adore being in control.