Actually, the background on the bathroom one is my downfall. Since it takes place in a bathroom, naturally I put it there, and stuck the props on the toilet because I couldn't place Joe closer.
The joke is supposed to be about what people can's help bit overhear Joe saying in the bathroom, but it is better done without showing him in the bathroom at all:
/comics/fuzzyman/279360/
So Joe's one-note characteristic isn't just that he's loud, it's that he yells this play-by-play of his life or everyone to hear.