OK. I admit, you'll rarely see me with a helmet.

I only use one when I"m riding with the club. However, I find myself wearing one at night because it enables me to put a blinky on the back. Believe it or not, the cars can see you alot better with that light then the blinky on the seat post.

For those who don't like carrying the helmet, I found that parking my bike in a hidden place enables me to do the same for the helmet. Afterall, who wants to steal a helmet thats on the floor behind a dark corner?