For me New Zealand ranks way up there especially the south island. The people are incredibly polite and hospitable (rivaling Japanese). The place is uncrowded and beautiful. You can go from beach to Fjords in one day! Was dirt cheap when I went (NZ $ was half of ours). Very kid friendly with every motel room having a kitchen and multiple beds, with milk in the fridge! And with seasons reverse of ours in US, a great place to go in Winter time. And of course, they speak English so no language barrier .
BTW, the direct flight takes you there from LA and the time difference is only 3 hours! Well, it is really 21 hours but that translates to 3 hours and a day lost or gained. So there is little jet-lag.
Close second would be some parts of Japan such as Kyoto or that depends on how much you enjoy Japanese food and your ability to get past language barrier.
So what are you favorite best places to go overseas?