Mine happened when I discovered SC2 in arcades as my first real attachment to a fighter. I was fascinated with her weapon and dedicated myself to try and learn her, meanwhile friends witnessing my character choice were convinced I was simply in love with the dominatrix aspect and being a fanboy...Oddly not having this cross my mind I was like 'huh...I'm not opposed to that theory..."
I switched to IFB-Pwnstar as a way to use a name outside SC's relevance where it might get lost (or confused with other Ivy's such as Batman's), but retained the acronym at the beginning as a marker to those that know me as IFB.