This whole cosplay is something that I guess I've never understood. I have a pretty good imagination, but imagining that I look good in tights falls outside of my abilities.
Admittedly, there are some really good looking costumes people have made. And while this level of nerdin' is a few steps beyond writing fan fiction in my book, more power to them. Who am I to judge? As long as you don't let your nerd interests consume your life and interfere with your family and stuff, have at it!