I have three that I've accumulated over the last three or four years. I don't actively wear them though. When I was in college, I'd wear em on very sparingly, but eventually I stopped after about a semester of it. Dunno why I bought more, but what's done is done.
I like them, but I can't really pull them off. I also think I'm a bit too old for that kind of shit now.
That being said, if I ever find myself at a con of any sort (anime, comic, vg, furry, etc), I'd wear one there.