LTR-Most of Latin America
I really feel for long term relationship best region would be most of Latin America (with the exception of Argentina, Chile and Puerto Rico). I found the girls in those locations, kind of cold and a little money hungry. I am sure there are guys who would disagree with me but I have traveled extensively in these countries.
My favorite for LTR has to be Guatemala,Honduras and Peru. In these countries, you can find nice girls looking for love and romance.
I used a service to find a Latin girlfriend in which they advertised me in specific countries. I don't want to plug them but if any guy is interested in the company, please P/M me and I will give you the details.