Having lived in Sydney, Brisbane and Canberra but spending the majority of my time growing up in Adelaide I think it's a great place.
Sydney, great to visit for the weekend, but as far a living there, no thanks. Commuting is too hard, public transport bites the big one, renting a decent place is beyond the means of the normal person, and don't think about buying a house for less that $400k within an hours drive of the City.
Brisbane is nice, a bit bigger than Adelaide, and there are also some great holiday spots only a few hours drive from the city. Noosa, Sunshine Coast etc etc, plus better casino's. Brisbane has the Valley where this is always something going on. Not having daylight saving is a bit strange, but then so are the majority of northern queenslanders.
Adelaide is a place that whilst you live in it you seem to undervalue it as a place to reside, but once you go and live in another city your attitude changes. I've been living away since 1998 and in that time it has grown up a lot, both commercial and residential, but it's taken that time away to understand just how good Adelaide is. Before I left, the Bay still had the dirty pile of dogpoo on the beach, I was shocked when I last went there. The residential developments in the CBD area has been impressive, the pub scene is great. Live music scene is pretty sweet.
Now Canberra, there is a shithole. No pubs, everything is a damn RSL, no beach, but we do have a dirty man made lake in the middle, Parliament House, which all that does is minimise the number of taxi's when Parliament is sitting. War Memorial is pretty cool, along with the National Museum, but outside of that, Canberra has bugger all. The worst and most arrogant drivers in Australia.
I'm not sure how the employment situation is in Adelaide, but a work colleague told me that Adelaide is a place to retire to, make your money, name, reputation elsewhere, but come back to Adelaide to enjoy it and the easier lifestyle.
Want to live in a great city, and if I had a choice of one free transfer with work, then I'd be looking at Perth.