Where I’ve been (so far)
I’ve been lucky enough to explore quite a bit of the world in my short 28 years, mostly since turning 21. The current tally (as of Nov 18, 2012) is 49 on 6 continents. My general policy and preference is to spend more time in one place versus “checking off” countries; on average at least one week per country. Flying through an airport does not count.
The map view is below. Blue indicates visits, red indicates residence.