I remember that one year I was NastyPcofWork, or something along that lines (in honor of Readfisher) and another I was DarkIncontinent (which I found ridiculously funny, even though no one else did.) My best one was JuneCleavage. I remember there were many delightful personae, although I can't remember any of them now.
So I lift my Michelob Ultra in a toast to the silliness and wittiness of Halloweens of yore on the Shelf! It was a glorious time!