There are four of us, I am kid #3, so I am in the perfect spot, as I can say:
"You're my FAVORITE big brother"
"You're my FAVORITE big sister"
and
"You're my FAVORITE little brother"

and not be contradicting myself! None of them have ever been fooled, though. We're all spread apart in age, my older brother is 8 years older than me, my sister 5 years older than me, and my younger brother 5 years younger than me. Ma said sometimes it was like raising 4 "only" children. Our father was an only child, so the inter-sibling bickering and blame games sometimes drove him completely nuts.