I currently live in Melbourne, sadly it has become a very expensive place to live over the past few years, house prices have increased considerably and the average young person really struggles to own their first home. Weather as people have stated is very mixed, Autumn is generally the most settled time of the year. I personally find the Summer too hot for me and certainly never sit out in the sun, I can get burnt walking from my car to the office! Summer also brings with it flies and mossies, flies I cope with by keeping doors shut etc, fly screens, mossies just make a b line for me and I end up covered in red itchy bites that swell up and pulsate. My late Husband was Australian which is why I moved to Australia, my Daughter from a previous marriage was 9 years old, I have not been unhappy here but I have a niggling feeling I would have been happier in the UK, by the way my Daughter and her Husband moved to the UK 10 years ago, they visit regularly but love the lifestyle the have in London, forever tripping over to various locations in Europe for week ends. Big decision for you to make.