What's it like growing up in a large family, raised mostly by siblings?

What is it like growing up in a large family, with elderly parents, and consequently raised mostly by older siblings? Say, you have 4–18 siblings and you’re one of the middle children?

I imagine growing up would be completely opposite of being an only child—e.g. you didn’t get as much attention, you weren’t demanding, you were confused, you didn’t enjoy being at home, you were very close to your siblings, etc. Anyway, would love to hear your story.