Are you not embarrassed by John Anthony Portsmouth Football Club Westwood (how unbelievably sad is it that I know his name!)? I'd not want him near my background picture.
Meowth, you are so right about the best way to respond is to use wit and irony, as part of intelligent banter, assuming the ability. Alternatively, you could try something more "route one" if you don't have the ability, although it will not be likely to entertain others.
SFC4BAG. No, I don't think you can. I've changed my avatar quite a bit and it just changes on every post I've made to the one I'm presently using. I agree that it would be a fun idea though!
Can you take a still or two off here Meowth? I have always liked the Garbage truck! http://www.youtube.com/watch?v=kwWIez82dlQ