So in my haircut thread, hair accessories were talked about a little and I started to wonder...

Are headbands and other hair accessories immature-looking? Should they be reserved for a certain age range? Or can someone in their early 30's (like me) wear them and still pull off a polished look? I'm thinking silk flowers, the butterfly (which is actually a pin that I attached to a hair clip!) and headbands.

Anything I should avoid?