Completly worth it. Feel so much safer with one
Helmets can easily look just as good as any hat, look at Bern or the rossi helmets... Besides, I got a 3rd degree concussion this year and I was wearing a helmet. If I wasn't I would no longer be able to ski park for fear of becoming seriously brain damaged. I mean, think about this. So many pros wear helmets, and besides, whats the stupidest way to go? Definitely not wearing a helmet and hitting a tree with your head.
Not worth it buddy, get a helmet.