Having brothers and being a younger sister usually means you're protected. For some reason I always looked to Brian for protection.
In younger, childish years, life with Brian was a war... I won only if he didn't make me cry that day. I usually lost.
Keith was not the protector type, yet he made his profession a cop.
There was always a strong bond between the boys which makes me sort of an only child.
I never like the idea of the work half-brother or half-sister. Although if you were step siblings that is a completely different story.