I have a brother that's 26 and a sister that's 30.

My brother always used to be my role model when I was younger and he'd fight with me physically usually because I'd always try to follow him around.

My sister pretty much stayed out of my life until I got older, like 18-ish. I'm 19 now, so it's easier to get on with them than before, since I know to give them their space.