Originally I was Questing Character -- which was often shortened to Questie, Questieh, QC, or Q (and sometimes Q-meh). As such I still respond to all of those nicknames. It may not be logical but then... when am I ever? Anyways, I've only ever had the two handles (that one and this one).
And Rosella is right, you guys would be SO confused if I didn't bring a bit of my "Material Girl" attitude to your special occasions. You'd be all, "Who ARE you? Why are you pretending to be Q???"