The "@" symbol was my trademark from the beginning of my 'net life, so I picked it for my HC symbol even though I didn't know what it represented. It got connected to the Gnat when Celli and I were wandering around a Rite-Aid and I kept changing topics and directions at a dizzying rate. (My therapist has suggested that I have ADD. I think... she's not wrong.)

Plus there's the whole "freakishly short" thing. :)