Yes. There are good and bad points to both. I kinda wish I had an older brother or sister to confide in but then there'd be the added pressure of having to socialize with their boyfriend/girlfriend when they brought them home.
2 half sisters, although they've lived in the same home and I've known them my entire life so they're just plain ole sisters to me. One's 23, Berkeley grad and getting her credentials to teach Elementary school, other is 25, Whitter grad and a math+science teacher at a High School.
I also have what I call a "quarter sister" who is 10 years old. Technically, we're not at all blood related, since she's the daughter of one of my half sister's dad + his new wife. I get to see her twice a month.
I also have a couple little "sisters" whom I have never met, from my dad and his other wife. My mum says I'm not allowed to meet his family until I turn 18 (idk why, so lame). I've seen a couple photographs of them though. I think one time when I was littler my "sister" Mina (I think that's her name) gave me a beaded bracelet and a note via my dad for no apparent reason. I gave her a bracelet via my dad back.