No one usually sees my costume either. But I love my costumes so much, and have so much fun dressing up in them I wear them anyway, if only for myself.
I agree though, it's more fun when I can show them off. One of the best Halloweens ever was one about 5 years ago, I was actually off work and my mom and I went to an outlet mall and shopped all day. And I was wearing one of my Medieval dresses all day while shopping. It had a long flowing train and everything.
It was fun getting comments on it.