There's 5years difference between my sibling and I. I am the eldest. We got along wonderfully. We did most things together, hilarity always ensued. Of course we did fight but it was definitely the exception not the norm. The only time we really had problems was when I got a boyfriend in my late teenage years, there was jealousy of the boyfriend. We're still good friends now.

I believe our personalities played a large part, along with my mothers parenting.