I voted North America!Believe it or not, we live on the primest slice of the world's most valuable continent, both in terms of agricultural and mineral (esp Mexico) potential, as well as coastline, diversity of climates, forestry and fishing resources (esp Canada), etc, etc, etc. No place on earth is hotter than Death Valley or colder than NA's northern islands. (Technically Greenland is part of North America, and speaking in terms of
plate tectonics, half of Iceland and small slices off eastern Siberia and northern Japan are too.) The shape of the continent is important too, with tall being better than wide.
Also, no other continent can match NA's transportation infrastructure, from sea to shining sea, while many other continents are unevenly developed or difficult to access, especially inland Australia, parts of South America, Africa, and Western Asia. Northern Canada and Alaska are far more accessible than similar longitudes of Russia. NA is also far less polluted than parts of Europe and especially Asia, with the latter doomed to a lot more pollution in the future.
(A side comment: It's a bit unfair how Europe gets to be a separate continent while nobody even bothers to divide the remaining Asia, a huge and culturally diverse land mass that holds more than 2/3's of the world's population. As their GDP rises, I think you'll inevitably start hearing the Middle East, South Asia, Southeast Asia, and East Asia listed in the same regional sub-category as Europe, with the term "Eurasia" being used more to describe them collectively.)