I have a sister who is 22, who I am not very close with. We talk occasionally, but we just are not close.
On the other hand, I have a 15 year old sister (half-sister) who I am very close with. She calls me a lot with all of those high school traumas, and we just have so much fun together. I also have an 11-year old brother, who I love to death--he is so much fun!!!!