I came from a family where my oldest brother was 18 years older than me. I always thought of him as a young uncle, rather than a brother. My little dude is 3 years old now and we want to have one more, so their age difference will only be 4. I think that gap will be big when they're young, but as time gets older they will end up closer than I am with my oldest.
By the way, I'm following you now. Great stuff! Check out my kids ebook that I just posted!
feel free to read about my other articles i wrote earlier... the dad-chronicals picking up diffrent headers...