Australia. It reinforced the rugby rivalry and made me realise how much the countries are similer culture wise. It also made me realise how good NZ was, though Australia does have a few points over us, namely the weather.
But I won't ever repeat that
I'd like to hit Europe or North/South America after Uni. I think I'll leave the Mid East and Africa alone. Would love to go to South Africa one day, but the current situation negates that to some extent.