I can tell the difference between regional accents to some extent, but I grew up somewhere with its own distinct accent so it might make it easier than say, in Sydney which is such a melting pot. Even different country towns have their own sounds. People move around a lot here though so the accents blend; also we have had less time in isolation for the accent to differentiate.

I have always been fascinated by the way all the southern english speaking regions have similarities in accent - South Africa, southern Australia and New Zealand.