Exactly. The only real solution is randomizing the starting characters. Which has already been suggested at least once. And it might provoke creativity.
If that were set up, I would run a comic contest where you had to submit unadulterated comics that you created by refreshing make.php until something funny resulted.
The only reason I'd object to changing the default characters is because of all the past and future jokes it would ruin. To tell the truth, I think those Asian girls are creepy-looking.
The what mentioned above is total fiction. Please don't take it seriously!