Besides zombie things my only real OC is my Fawn costume, http://www.cosplay.com/costume/476217/
I made her for Scarborough Faire last year in the course of a weekend and everyone at the Faire loved it, I literally could not take four steps without someone requesting a picture. I had tons of people ask me if I worked for the Faire! (I wish!) It was loads of fun and by far she is one of top favorite costumes to ever wear, I even updated her a bit for this years Scarborough Faire and look forward to many more years of wearing her.