Great thread!
I was supposed to have a different name, but apparently it was taken and the SHH wouldn't let me join in. So I let one or two years pass before I could finally join here.
Back in 2005 I used to post in another forum (about Superman but it had forums for many other superheroes) under a different name. Then I had an argument with some philosopher wannabe member there. At some point I replied to him with a joke and he went: "Oh, so you gotta be a clown?" and then I felt a new personality had been born.
So I came right here to be "The Clown," he who can only reply important issues with some stupid joke. Right then I decided to turn it into "El Payaso" as Spanish is my native language and it sounded and looked much more irritating and less 'The Joker'-like.
Last touch was to add a Cesar Romero avatar, as he was a latino actor playing a clown. Plus, at the moment I thought a comic book or Nicholson's Joker pic was too much of a commonplace.