I've been with a few of the "old guard" people for a while, so they know at least two of my aliases. I don't think Meteor Blue shows up in my history though..
Meteor Blue - was in the Philippines and my cousin showed me the game Gunbound. I needed a name quick so I could play. I like meteors. And the color blue (along with a lot of other colors). There.
bugturtles - I was playing Metroid Prime Hunters way back when it first came out, and a toddler whose family we know very well watched me. It was a first person game, and all you could really see of yourself is your arm cannon. He kept saying "bug!" and I kept saying "turtles!", and then he said "bugturtles!". It stuck with me.
Birds - Changed it to match my alias on Urban Terror. Then changed it back because I like bugturtles better.