Lived there for a few years and my entire family still does. I would move back permanently in a heartbeat if it was an option. A very clean, well planned city with lots of greenery and little traffic. There are lots of museums and places to go, and lots of restaurants. Like someone said earlier, Kingston and Manuka is probably best if you enjoy the night life.
For the size of it, Canberra is spread out. The suburbs all have their own little shopping areas, and each cluster of suburbs have malls and town centres, then there is one big centre/CBD which is known as civic. Canberra, in my opinion, is a very safe city. One thing I loved about it was that you have everything you need around you - a good selection of shops, Ikea is being built, Costco arrived not long ago and even if that wasn't enough you can always hop onto the Hume highway to Sydney for the day. Someone else mentioned that the South Coast is a couple of hours away too, and there are lots of walks and small towns not too far that can be explored.
I'm not going to lie, it's not for everyone but with it having a reputation of being boring and in the middle of nowhere, a lot of Australians don't give it a chance. I guess the worst that can happen is you try it and don't like it?