I am an only child. I wasn't raised in a traditional household, so it was often just me and my mom. We spent most of my childhood very far away from extended family, as well. There are benefits to being an only... I'm very comfortable in my own company, which I didn't realize was an unusual trait until spending more time with my adult peers. I guess it's also nice to know that I was the most important person in my mom's life. No competition or questioning my place. LOL. I did wish for siblings when I was growing up, though. Being and only can be lonely... And it seemed like every one else had at least one sibling. It was just one more way that my family was weird or different in my eyes.
I eventually became a mom myself and didn't know what I wanted to do about having more kids. I honestly loved my daughter SO much, that I wasn't sure if it would be fair to bring another child into the picture-- because surely I couldn't possibly love them as much as I loved her. (I know that sounds crazy, but that was a legitimate concern of mine ) However, things became very clear when my daughter was 2 years old... And my mom was killed in a car accident. I was 20 years old and my whole world just imploded. If I didn't have my daughter, I know I wouldn't have survived the grieving process. It was devastating. And because of that, I knew that no matter what, I didn't want my daughter to ever have to face that type of loss alone. Close or not, siblings are keepers of your childhood memories. Shared experiences are so important to us humans. Because my mom and I had lived so much of my life with just the two of us, losing her wasn't just about losing my mom... But the only link to my entire history at that point. It's a terrible feeling.
So yeah, now I have three kids. I'd have even more if we had the space for them. I love that they will have each other long after I'm gone. They may not always get along, but that bond is so special. I'm grateful for it. It really is such a personal decision, though. Obviously my own choices were heavily clouded by my experiences, which are not the same as everyone else's situations.