Since I'm ultra broke, I tried to pull off a cheap version of Commander Shepard. People seemed to enjoy it.
I alteried a hoodie since I can't afford the actual N7 Hoodie, but by doing so I'm saving something like $40 USD. I was planing on wearing a wig, but couldn't get one. My plan was then to have my hair cut short and straiten it out. However, it was humid when I wore this for Comic Con, so my hair looked horribly curly & frizzy.
Well, people liked the sign, and since I was wearing the N7 colors, I got a 360 Avatar Normandy prop code as well as an inflatable Omni-Blade.
Also, I got a few discounts/freebies for saying "I'm Commander Shepard and this is my favorite 'X' on the Citadel."