When I first registered I was Gir because LOL SO EDGY AND RANDOM INVADER ZIM REFERENCE.

Pretty soon I realized how silly I looked and it was a combination of that + the fact that I went by Pike almost everywhere else that had me changing my name before long. NEVER AGAIN.

Edit: For anyone who cares, Pike is a shortened version of "Pikestaff", a roleplaying character I made in like 1998 and "RP'd" (trolled, mostly) with on message boards for fans of the Redwall series.