SecretTacoNinja originaly started off as SecretTacoNazi, which I pretty much stole off a YTMND video, I wanted something to do with Tacos because of a Robot Chicken sketch, It was "My name is George W Bush and I want to say, TACOS RULE!". I changed 'Nazi' to 'Ninja' because the name 'Nazi' has a lot of controversy surrounding it (anyone who thinks I have something to do with Nazis must look at the two words 'Secret' and 'Taco' before it), 'Ninja' sounds cooler and they both put a funny image in your head.
My avatar: I found it on Google images and I thought it looked awesome, plus I think the Hippo represents me very well, I am big but fast, short tempered, mean, protective of the people I like, a bit dense and I like being in water and biting things.
There you go.