How did you come up with your nickname?

So in this thread I would just like to know where do all of these nick names come from. Some of them are weirder than others, but they all have their story. Let me start :

One day I was playing Assassin's Creed 3 mulitplayer with my friend. As we got up the levels there was a title that was given to me caled the ALFA. And then I knew that it was perfect. And apart from that I like wolves, but normally they take Alpha so I just stayed with ALFA.

My previous nicks were: Lincolnman and Fil McGaming