I'm in a bit of a big family, but at the same time not really. I have three older half siblings (Different dad) that are all at least 12 years older and married and everything. Because they're all adult and stuff we all get along fairly well, especially now that the oldest sister is single again.
I tend to get along best with the younger sister and my brother. It helps that they're a little closer to here than the eldest is.

I have two older siblings. One of them moved out when she was seventeen, so it's just Altearrain and I at the house (including our parents). I like to think we get along with each other. Altearrain and I are hardly separated, by means of location. For example, if I was in one room, she'll come and sit next to me-- vis versa, as well. Actually, I don't think we'll be separated at all-- even if we graduate from college. You see she has a mental disability and our parents are starting to get old. Our other sis is already married and has a kid, so she only has me. Besides, I don't mind her company, in fact I quiet enjoy it! Don't get me wrong, we fight and argue-- but we learn our differences and forgive each other.

I have 2 siblings, a brother and a sister to be exact. We get along decently though we occasionally fight, though that is expected with all siblings isn't it?

I'm an only child, and I've also grown to consider it a rarity. Most of my friends have siblings, and almost all my cousins have a sibling, with the only cases being where their parents' marriage wasn't successful (to the point that one of them didn't even get the surname of her father).

I've sometimes thought of what having a sibling would be like. I probably would have become less lazy, but chances are I could become doubly lazy, so I'm good as I am now. Also, I've been able to do a ton of things the way I liked without somebody else getting in the way (not counting my parents, of course, they always get in the way). 

The reasons as to why I'm the only one in the family having no siblings with my parents marriage being "successful" (they married 15 years ago at most, that gives you a hint of how successful their relationship really is) is very simple: I was born very late. Both my parents were +35, and for what I know, it was actually hard I even came to existence, which can also explain why I'm 6 years younger than my youngest older cousin.

I've grown to build brotherly relationships with some of my friends and cousins, but it's not the same, as distance gets in the way, even more now that my cousins are starting to have kids of their own. I've accepted my fate as a lone wolf, and even like to be alone at times, unlike some of my friends who are partying today, tomorrow and the next weekend.

Although I do have a stepbrother, he's like 10+ years younger than me, so we weren't exactly close nor grew up together. I grew up as an only child, which was probably good because my parents never got along.

I'm sure if I did have a brother or sister, I would have been nice to them. I believe I'm nice in most instances, unless you give me a reason not to be ;-)

I have a brother 6 years younger then me. Other than the casual trash talk we get along great. We haven't fought (verbally) in a good 3-4 year at least which says a lot. I was never really one of those big brothers to really put my hands on my brother.

I have 4 brothers.
1 older and 3 younger.
When we were younger, we used to fight all the time, but now, we get along very well.

PacmanandMariofan :
I haven't had a Sibling my cousin had a sibling.Well that's it They always get into problems.Fight at each other for serious things(He is kinda 16 or my age IDK).He has some serious issues.Well we both hangout and we are kinda bros.So nothing gets in our way except for his sister.God dammit!.I do not totally Hate her just sometimes.And if you have some internal relationship with someone they will nag with you until you tell the gosh darn truth!.But thank God I don't have a sibling.I suggest for you to maintain a healthy relationship with your sibling.

I have one younger sister. She's 3 years and 3 months younger than I am. Honestly, we never really got along well. While I'm a gamer, she's an athlete, specifically a soccer player. So, we don't really have common interests.

I'm athletic considering, but I just game more than I play sports. That's just a fact.

I only have 1 sibling: a younger brother. I usually get along with him pretty good and have never had a physical fight with him before. 

RDay13 : Thankfully, I haven't had a physical fight with my younger brother either, even though he hits people once in a while, mainly my sister. He doesn't even have a reason, he just feels like it I have argued with him a lot in the past though.

I have one younger brother.We get along pretty well, but, he really likes to bother me.Like, for instance, he'll bring his Wii U pad into our room to watch Youtube and I'm stuck in there with my PS3 and I'm not exactly a social person when it comes to using my recreational time.He just distracts me and it drives me crazy!Oh well.

Spidey243 : I'm the same way when I want to play video games. I want some alone time but my brother constantly begs me and my parents to let him watch me play. When he does, he asks an incredible amount of questions even if it's the same game again and again. Plus he isn't even watching the game most of the time, he's just looking around and talking like crazy.

I have an older sister. 

Our relationship has been strange and varied over the years but it's typically good. Like any family, we have the odd fight and our personalities clash on a seemingly weekly basis. Despite all that, she's family and I have a lot of love for her.

I have one real sibling and one step sibling. My actual brother Matt, and my step brother Jake.

I get along with Matt for the most part. We fight occasionally but not that much. I get along with Jake too, I don't think I've ever gotten into a fight or anything with him.

tgags123 : I would never be able to live with that many people. I live with a step-step-step brother now for like a year and sometimes I have 2 and things just get beyond crazy, the kind of crazy where you end up melting your eyebrows in oil because you can't take it anymore.

I have four biological siblings and three of my siblings are my younger sisters that are triplets then there's my younger brother. I have four half brothers two are older than me while the other two are younger than me. I hardly ever get to see my half brothers anymore but I haven't forgotten their names yet although I haven't met one of the older ones.

I have one younger sister, who is 2 years younger than I am. We're strange - we get along super well, but we can also fight. It's not as bad as it used to be. Nowadays we just annoy eachother. She annoys me by asking for stuff, and I annoy her just for the sake of having fun lol.

I have two older sisters that are twins and six years older than me. One was always a goody-two-shoes type and the other was a bit of a rebel. When I was really young, they would always team up to pick on me whenever they could. When I finally grew up enough to be bigger than them that came to a screeching halt lol. Being more alike me and the rebel always got along pretty well, whereas the other sis would constantly narc us out when we were scheming. Those were the good ol' days
As things are now we all get along ok. They trust me for the most part but I'm still repairing the relationships somewhat from being an addict for so long. The former-rebel has two kids, a girl that's 4 and a boy who turned 1 yesterday. The other sis is about 6 months pregnant with her first kid (a girl) so it's always fun to spend time with them.