Let's see.
Joined Viridian Entente in August 2006 due to interesting messages from kirbygirl, Argin, Peeko, TheFinalHero, and Egore. Rose quickly to government roles and was there till the Viridicide aka Green Civil War. Post GCW, I went to GPA for a month, spent a few weeks causing problems with GGA and NPO, joined Golden Sabres with God of Salt.
I spent about 2-3 months there, I learned about guerilla fighting there and tech raiding.
Then Egore came back to the game, and plans were formed to start a new alliance that would be on the blue team and use the old Viridian ideals. This was the Royal Dominion. RD later merged with another alliance to reform the Viridian Entente. This was late September of 2007. After VE reformed, I've been there ever since. Have I been tempted to leave? Sure. But honestly no other community does the same for me like VE's community.
So if I were to chart this:
August 2006 to May 2007 - Viridian Entente
May 2007 to June 2007 - GPA
June 2007 to July 2007 - Golden Sabres
July 2007 to Sept 2007 - Royal Dominion
Sept 2007 to present - Viridian Entente