I lived in a tiney, tiny house when I was a little girl, and I shared a room with my two older sisters. I hated it, because I never got an privacy when I was changing or doing homework or trying to read. Plus, they had to study for tests since they were older, and so they stayed up half the night quizzing each other. My mom realized the stress so what she did was she set up a curtain that went from one side of the room to the other, we could close it when we wanted privacy, or open it when we wanted to play and have fun.
Haha, yea, it was hectic. I think age should be About the same, a couple years difference shouldn't matter, but don't put your 4 year old in with a 17 year old, if you know what I'm saying. Gender, though, I think matters a lot! I mean, not to be stereotypical or anything, but boys usually like to bother their sisters, and when my brothers did that, my room is where I went. There would be issues if the bed room was also his!
Haha, yea, but if their both girls with a good bond, then go for it!!
:)