It depends on your language combination.
One example: If your mother tongue is German (and you don't have English as a B language), you should go to a country where there aren't so many German A interpreters. You can check the aiic database to find out.
Don't forget that you will have to live in that country and you should like it.
answered 24 Oct '11, 21:43
Angela is quite right, a lot depends on your combination.
In absolute terms the biggest markets are in Brussels (the EU alone recruits 100,000 interpreter days per year), Paris (private market worth 90,000 interpreter days), Geneva (a lot of UN institutions and a healthy private market) and Germany. (For historical reasons work in Germany is not centred in a single city but spread across the country with Berlin, Bonn and Munich being major centres.)
answered 25 Oct '11, 08:29