Leaving out countries I only visited an airport, but counting countries I only spend half a day or so.

:
Argentina, Australia, Austria, Belgium, Bosnia, Brazil, Canada, Chile, China, Croatia, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Luxembourg, Monaco, Morocco, Netherlands, New Zealand, Norway, Portugal, San Marino, Slovakia, Slovenia, South Africa, Spain, Swaziland, Sweden, Switzerland, Tanzania, Turkey, United Kingdom (England, Northern Ireland, Scotland, Wales), United States (about 20 states), Vatican City.
I love

visiting new countries, but I'm always glad when I return home (Netherlands). Guess friends and family are more important than the country. If I
had to choose a favorite country for vacation it would probably be Norway. Wish it wasn't so damn expensive though.