My sister is just over 10 years older than me.
She was always really good to me, really kind and i totally adored her. Lots of memories of her taking me to the park or swimming or something.
She left home to go to uni when I was 7 so didn't see too much of her after that.
My parents paid for us to go away just be two of us a couple of times when I was about 18 and those holidays were good fun.
We weren't super close because we obviously didn't have many shared experiences or interests when I was younger, but that levelled out by the time I got to uni and we had a more adult relationship.
We spend a reasonable amount of time together now - have dinner just he two of us, spend time with her and the family (she has kids) and socialise with each other's friends sometimes.
We both got loads of attention from my parents as we were essentially two only children. She says mum and dad were WAY more chilled out with me because that had done it all before with her.
The only negative is that sometimes it was a bit lonely not having a gang of brothers or sisters to play with near my age, but there is no guarantee that siblings get on anyway, and the benefit of attention from our parents probably out weighed that.