@ernesjohnson I have 5 siblings: a combination of whole siblings and half siblings from both parents.
I would describe most of them as good. I guess age is a factor. I'm the youngest and my siblings are 4, 14, 16, 18 and 19 years older than me. So some were already in college and away before I was born. We get together a few times a year, but we don't talk on a regular basis.
So we all pretty much have separate lives, other than my next youngest brother.
I saw them a lot on school breaks and holidays and things like that. Sometimes I'd have overnights at their houses and we'd go out and do things.
My closest brother in age was too cool for me, so he left me behind a lot. Now he needs me a lot in adulthood. He also has a lot of mental health issues and is... just very selfish. No other way to say it. So he changed as a teen and our relationship has changed as a result. I miss who my brother was, and I always wonder how our lives would have been different if he was who he was before.
Our relationship is kind of "meh" now. Brothers children are in limbo and might need to be adopted out, so I think that's a factor now.
I would say overall that sibling relationships are what they put into them. And I think that parents can be both a help and a hindrance at any age fostering the sibling relationships.
I have 3 kids and they all have great relationships. I have one bio child and I adopted my son's younger half brother and sister. (I wanted to be one and done. Life had other plans).
2 boys 11 and 10 and a 5 year old girl. Our little girl is very... spirited and she can definitely keep up with the boys.
Our boys are so close because they basically grew up together, and still choose to share a room, so that's a factor too. At times they're nice to their baby sister, and other times she beats them up (there is no manual for that), so it all just depends