Ha! My boys get along when one of them hurts the other into tears and then they feel bad. Lol. 

I don't have kids. But, coming from a family with 5 kids ranging (at the moment) from 14 to 28, it depends. My brother and I are 1 year apart and we have pretty much always gotten along but we are the only consistent ones. But, my sister, who is 5 years older than me was always a terror, until she had kids of her own. I believe that the closer the kids are in age to each other, the closer they are as they grow up because they are growing together, not separately. Also, the further apart, there could arise some serious jealousy issues.

Nope. My kids love each other. They get along great, they are 3,6,7,10. They play great well. They have their moments far and few in between. My three girls share a room my son has his own room Which he only uses to sleep in. We have actually considered making one play room and one sleep room. But our one daughter is getting a bit older. We do everything as a family though. We have family meals, and Sundays are Family day. 

I don't have kids, but from my Nanny days, it seems that the bigger the age gap, or the smaller the age gap... they tend to fight more. I know that doesn't leave much room, but that is what I experienced. My sister and I (being 18 months apart) hated each other until we got to middle/ high school. My moms friend has kids who are 11 years apart, and I don't think their relationship will ever recover.

My sisters are 5 and 8 years younger than me, and I have several friends with siblings (mostly sisters) around the same age difference (5 to 8 years).

I feel like most of us were taught around the time the babies were born about how fragile they were and how they needed to be taken care of, then involved in caretaking activities, e.g. watching or holding, running and fetching, playing with and entertaining, reading to them. I definitely remember feeling a sense of pride and responsibility and very little envy or resentment most of the time when they were little (i.e. <2). However, this developed into an 'authority' complex by the time they got older (like 3-5) and wanted an sibling as an equal rather than a superior. My parents explained this but it took me a while to really figure it out, and in the meantime we had lots of conflicts because I was trying to be a 'rule enforcer'. And of course property-conflicts, older sibling being mostly responsible for joint messes, etc. were pretty common ground for disagreements. Unless someone got hurt or something got broken, conflicts were usually assumed to be both parties' fault, and we were sent to separate rooms, or sometimes, corners, until we could get along civilly again.

I don't have any kids but I have 2 siblings.

 My brother is 30, my sister is 23, and I am almost 20. When we were younger my sister and I hated each other. The only time we got along was when my brother was around because we weren't too found of him. My freshman and sophmore year of high school my sister became my best friend and I still didn't like my brother. Today, I love my brother and we get along since he has moved out. My brother and I both, for similar reasons, don't even talk to my sister anymore.

I only have one child, but my sister and I were exactly one year apart. My sister and I hated each other all through growing up and aren't any better even now, (I'm 23 and she is 24.) In my opinion she had us WAAAYYYYY too close together. My husband and I have a 5-month-old daughter and we don't plan to have another until she's four or so. I don't wan to have so many kids at once that I spread myself too thin over all of them and none of them get the amount of individualized attention that they really need; not just what I might THINK they need. Another contributing factor to my my sibling situation was that there was also clearly favoritism for my sister going on on the part of my mother. She even admitted that later on.