In general which pair of siblings are more likely to get along - brother-brother or sister-sister or older brother-little sister or older sister-little brother?

It depends. Im a girl & I have an older sister and we get along just fine, but I know some of my other friends that are girls and have sisters and dont get along with them. Some brothers get along very well, and others dont at all. It just depends on what kind of relationship you have with your other sibling.