we've been in Australia for nearly four years now and, having got our permanent residency visas this year I'm in no hurry to go back to the UK, certainly not with the current economic / government situation.
There are pros and cons to emigrating, but on balance I'm happy down here. But everyone is different, and while we have a number of ex-pat friends locally, some who have been here for most of their lives now, we know of other who have not been able to adapt and have headed back home after a few months.