My user-name comes from an idea I had when I was younger. I was really into comics (particularly Green Lantern) and wallace and gromit, and I created my own character that was sort of somewhere inbetween the two. The backstory of the character was that Hal Jordan (or who ever was green lantern at that time) died and gave his power-ring to the penguin from 'The Wrong Trousers'. The penguin decided to become a good guy and became the 'Green-Penguin!!!'

Later I made the penguin Mexican, so that it could wear a sombrero and a poncho, hence the 'O' at the end of 'GreenPenguino'

Later still, when I created a youtube account, I decided to use the name I had created as my account name, and I've been using it ever since.