Hi jasepom,
In my mind we are swapping a "comfortable" life in Australia for an exciting life in London. Every one is different.
My husband and I are actually looking to progress our careers to the next stage and have decided on moving to the UK for this reason (as well as many other reasons). This decision has not been made lightly, but Australia is not offering us what we want at the moment. As I said every one is different.
Thanks,
Clara