Welcome to Gaia! ::

North America: United States, as I already live here...
Europe: Germany or Switzerland
South America: Argentina
Africa: Seychelles, a nice tropical island =u=
Asia: Japan or Taiwan
Oceania:Australia

I totally wish I could have dual citizenship between China and America...whenever I go back my parents and I have to go on the "foreigner line" lol

Before you get it, if you can, you should check with what India says about the responsibilities of being a citizen there.

Oh, and check about passport laws. Some countries don't allow you to have 2 passports; you can only have theirs. Since you live in the USA though, and say India did have a law like that, it'd probably be better to just have an US passport since that gives the right to enter the country (just in case anything weird happens.) Also, I think there's a law that says if you are a US citizen and have that passport, you must present it upon entering the country. So don't try to impress Customs with your fancy Indian passport, because they might not like that. XD

For me:

North America: United States (although I am also not a fan)
South America: Argentina
Europe: UK, France, or Italy
Africa: Egypt
Asia: Japan, Pakistan, or India
Australia/Oceania: I guess Australia o.o
In Antarctica I'm living with Fabre and his penguins.
o;