13 year gap between myself, and my youngest brother, more with the older ones (obviously), old enough to be my fathers.
When I was young, they were amazing, literally like having four fathers, lots of playing and attention. The two older ones moved out when I was only 3/4 though, so from that point on, just visits, although as I got older, they did take me out to rugby matches and to the club! I was closest to the youngest brother, but he left home soon too, so again arms length.
We all saw each other on and off over the years, lots of family parties when they had children. The saddest part is as we have older. They no longer have young children, I do, and because they are now retired, they no longer are interested or have much thought to my DC's. Also I find they can be quite old fashioned in their views, different generation, and I get quite annoyed with them. So, now, we probably only see one another 3 or 4 times a year, and they don't even bother sending gifts for birthdays to my DC's, which is really sad for them, they notice.