Firstly, I think this is a fascinating subject that isn't discussed on HN enough. A lot of friends of mine have multiple citizenships, so this is an interesting subject for me personally. I know two people with dual Russian-US nationalities, which they both loudly proclaim to be the best. I also know a number of people with dual European-US citizenships, and a handful of people who have a smaller non-EU country and a US citizenship. I also know some people who only have just one smaller non-EU country's citizenship.

I've personally had the discussion several times about what the best citizenships to hold are. Some people I know are wealthy enough that they could simply afford to purchase additional citizenships; some are undocumented in their country of residence and holding even dual citizenship is only a dream.

I'm personally of the opinion that there are a few "classes" of passports: European, American, Russian, South American, and everyone else. Russian, because it allows you free travel between the former Soviet states; European and American for obvious reasons, and South American because most South American countries permit free travel with citizenship.

Less commonly known passports I have special love for are the Chilean passport and the Dutch passport (which I have). The Dutch passport because it is very difficult to obtain (and requires you to give up all other citizenships unless obtained by birth), and the Chilean one because it is the only passport to allow free travel to all G8 countries.

It's also interesting to watch how the Syrian passport fell from "medium quality", relatively close to high quality, to the fourth worst passport ranked. In the same time, only a few countries fell positions: El Salvador went from high quality to medium quality, and the Congo went from medium to low quality.

For those in the thread asking for a copy of the 2016 report: https://www.henleyglobal.com/files/download/HP/hvri/HP%20Vis...