Thing about working there is that you're really talking about 2 things: lifestyle and location. And Oz is so huge and diverse, it's almost a whole load of countries in one. I've worked in both Sydney and the outback in Western Australia, and it was 2 radically different experiences. If you like the city, head there, or there's quieter very beautiful places to be if you want to find work there.
However much everyone bitches about the culture in Australia, or rather, it's lack of one, they do have a much more laid back attitude to work. The prevalent long hours culture of the UK is seen as a bit of a joke: they all tend to knock off work at 5 and get down to the beach or go round to friends. I found it difficult coming back to London because the pace was just so frenetic. I still haven't worked out why everyone's in such a hurry.
You can generalise about the Aussies, but there's some good ones and not so good ones. Bit like the Brits really. The friends I'm staying with here are probably more politically radical than most of my friends in the UK. You meet all sorts.
I'm back in the Tropics in Queensland at the moment, and it's lovely and hot am I hanging out in Tshirt and shorts. As always, shoes are optional. We're heading over to Magnetic Island tonight to meet up with some old friends and get dri\unk on the beach and look at the stars. I forgot that what I like about being here is the peace and that you can hear the curlews and sea at night, and all the wildlife. I wouldn't have noticed that there was a full moon last night if I'd still been in London. I hate the fucking mosquitoes though. They love me.
Working in another country doesn't have to be permanent, but I think it's always good to get away for a bit. If you're talking about a skilled migrant worker's visa for Oz, they do take about 12-18 months to process though.