1. I have four other siblings: two older stepbrothers, an older sister, and a younger brother. Usually we don't have all five under the same roof, but we did at one time. For awhile, we'd have my two siblings and one of the stepbrothers, and then my sister and stepbrothers started moving out, until it was eventually my little brother and me. Right now, we're pretty spread out. My stepbrothers live in Hawaii, my sister lives in Kansas, and my little brother is in Germany with the parents.
2. I like having brothers and sisters. It makes the house interesting, even if they're driving you up the wall at times. If you're alone, it's just really lonely. With siblings, you have someone closer to your age to talk to, and if you don't have friends, at least you have a sibling or two to turn to. So no, I wouldn't want to be an only child.