This reminds me of my childhood when I used to create my own countries and empires. I had a great imagination back then but I have lost it since :(.
Anyways, this is quite complicated for me to decide. The first system that my sisters and I owed was a NES that my best gave me after he got a SNES. Then for Christmas, a year later, my mom gave us a SNES. After that I didn't have a gaming console for a very long time until about 2004 when I bought for myself an Xbox. I gave that to a friend and really didn't get into gaming again until Halo 3 in 2008 which created my love of gaming as it is today. So, I would have to say that I would be born into Nintenidos, since it was the first console that I had. However, could it be possible to have a tri-citizenship for Microsofia, Sonaria, and Nintenidos since I have all three?
Oh wow! I just remembered that my dad brought home an Atari, I don't know which number (2600, 5200, etc.), before we were given the NES from my friend. I remember having fierce battles with my cousin to see who could get the most points in Defender. I believe she wound up earning the most in the end.
So, that means I was born into the Atarian Empire. However, the people over threw the Emperor and became a free nation, only to be conquered by Nintenidos a few years later. The lands that I lived on were then overtaken by Microsofia in 2004 only to be re-taken by Nintenidos in early 2009. However, on Dec. 31, 2009, the three Empires signed a treaty that created a neutral territory. My land is part of this "Neutral Territory."