I have no stickers on my helmet. I am considering a new one, but in any case what I' like to do is to have it aerographed with some image, not of localities or sites I have traveled to/skied, but of something that represents my past.
Obviously I have no problem with others putting stickers on their helmets.
Now, this poll thread is about stickers on helmets and ski, so...sorry I do not have stickers on my helmet but...on my backpack yes!
How comes? It's easy, I use a rigid backpack from Boblbee (a swedish firm I think now defunct). Heavy as hell, particularly if/when I skin/walk my way up the mountain, but comfortable and...doubles as back protector (already tested)...