The helmet is a good place to mount my mirror, then i can use any glasses i choose. The wife and kids would freak if i didn't wear a helmet too.

The pro-helmet wearers will usually quote some anecdotal evidence of helmet benefit. The anti-helmet crowd will pull up studies that prove thier point. And a helmet thread on this will resurface here at least monthly *yawn*

The only firm opinion i have on the subject is legislation. Helmets use should not be manditory.