Best of both worlds.
I grew up as an only child, but I got cool with my siblings as an adult.
I liked growing up as an only child. I had my space, didn't have to share. No one touched or moved my shit. It was quiet when I wanted quiet. Shit was goat.
When I was an adult I built a close relationship with my two older sisters from my father, and their kids.... Also I chat with my older brother from time to time.... My sister's and I are really really close. You would think we grew up together, but we didn't. And I'm kinda glad, cuz my dad was a jerk and my sisters still hate each other to this day cuz he always pit them against each other, so there's still this lasting resentment.
They were prolly both jerks as kids....I didn't need that growing up, lol