Australia/New Zealand are pretty attractive, citizenship-wise. As an Australian, I get the 'reciprocal' treatment - i.e., we will treat you as you treat our citizens, and since thats pretty good right now (Australia lets many European citizens in for a working-visa, two years on average), this means I can move around most of the western world without too much fuss.

I cringe at the hassle my American friends have to go through whenever they travel through a densely-packaged country region such as Europe .. whereas we Australians seem to get treated pretty well.