Hi,
I live in Sydney and commute to BNE, CBR, MEL, ADL, PER, AKL or WLG depending where I need to be this week, or that week.
Yes, it drives you mad.
Secondly Sydney is actually a really great place to live. I have lived in Adelaide, Melbourne and Sydney but have spent enough time in the other places to feel well informed. I thought I was going to hate Sydney but it's so much like lots of small towns joined together, in that once you are settled in an area, you really don't get out of that area much.
I know of a number of people that work in Canberra but live in Sydney and commute a few times a week. Also people that live in Adelaide and commute to Sydney on monday mornings and back friday nights. In these cases, they know well enough their schedule and so can book the cheap fares far enough out.