I always wear a helmet. originally because it was warm....didn't fit right, didn't feel right...but....
Have since had enough crashes including one serious whiplash crash after launching off a compression into a jump on a race course that left me dazed even with the helmet. Result is that I believe its far better to have the cushion of a helmet, than not, between my noggin and any hard surface of any kind.
I don't look cool in it but am too old to care any more and hope to continue skiing and get even older while doing so.
As most have said though, it should be personal choice, or a decisio