I didn't grow up with extended family as we moved interstate when I was 7. I missed growing up without cousins, aunts and uncles etc around. Even now as an adult I try to come back for SA each year to spend time with the extended family. It's been made slightly harder now my parents have moved interstate and my sister, BIL and nephew are there too. It does become expensive with all the travel.
My sister and I were talking the other day and I think we're both on the same page. She doesn't want to come back to Bris and I don't want to go to where she is. If we both had the opportunity to move to Melbourne or Adelaide together, we probably would because we want our kids to grow up with each other. The bonus of Adelaide is that we have more family and my aunt has a DD the same age as my nephew (and they are so cute together).