irish then scottish and english accents do it best for me... then any eurpoean accent....
coming from australia (i dont know, may be the same in other countries) we have a really diverse culture so we often run into people with lots of diffenerent accents and it is really good
when you go out sometimes.
and of course cant beat the good ole' aussie accent and our aussie slang.... as i like to say 'we speak australian, not english...'