Never been to Japan/S.America though so wouldn't mind ticking those off a non-existent list.
and while i'm at it, @chicoazul who also expressed interest in Argieland... SA is great. been here a little over a year in Asuncion, Paraguay.
been able to fly to Buenos Aires & Mendoza in Argentina, Santiago, Chile and Rio. Did a bus road trip to Curitiba, Brazil as well as Iguazu Falls on the Argie side. every time i check a place off, i learn of more to see.
i've enjoyed everywhere i've been. Argentina particularly as the dollar (and your pound) goes so far down there. their largest bill is 100 pesos, which comes out to about $8 US.
still have plans for Patagonia this summer and Machu Picchu this fall...
if we extend a 3rd year here, hoping to add some Bolivia and Colombia to the list. and maybe Uruguay, though am wary of a nation that has legal weed and idolizes a cannibal. (insert giant walking human-munchie fix joke here. I'm too lazy to come up with one.)