Thailand - the Nan loop, especially Phayao to Nan on day 2 of the trip, 222km of some of the best roads in the world.
The roads are challenging in places, and sometimes they just stop and turn to gravel where they haven't finished making them, and you have to look out for cows and dogs round a blind bend. But generally it is smooth tarmac, no potholes, no manhole covers, no grannies in Fiestas, no speed cameras - and a cold beer at the end of every long day followed by a Thai foot massage - bliss!
http://thaimotorcycletouring.com/ind...oop&Itemid=107