I have more stories of OC's than normal cosplay. If no one has seen your character before, it's NEW, its cool, etc. I've been asked many time "hum, I have to bug you but are those real?" and since my OC are combo crossplays...yeah a deep voice saying "I'm a guy" destroys the fan, they love it if done right.
of course peeps who have no fun usually buy their cosplays and/or components, mess around TOO much(or not enough) or have no skill to use, nor imagination worthy of said reactions. So it's worth it if you are up for the challenge and can take the heat if it's not that good.