I arrived under a document of identity as a 2yo, so I had bo choice in the matter. I have Aus citizenship and identify as an Australian. My parents moved for a new life, a warmer climate and to help improve my fathers health; illness had plagued him since serving in WW2.
My parents saw opportunities for a better life in Australia and were impressed enough to never wish to return, albeit for holidays. Also father wanted to return to the country his father, soldier-settler, had received a land grant in Manjimup (near Pemberton) W.A. Although grandfather was killed in a blasting accident my father had fond memories of Australia and following WW2 wished to re-emigrate. I have only one brother who returned to the UK; he prefers cooler weather and the lifestyle there. None of the rest of us would ever think of moving back though. I think we are all financially better off, had better opportunities and enjoy a better lifestyle in Australia than we would if we had stayed in the UK.