When I deployed to Kuwait in 2011, I decided to adorn my own helmet with a homage to Stanley Kubrick's Full Metal Jacket, in which Matthew Modine's character, "Joker" had the phrase "Born to Kill" written on his helmet.
I still have that same helmet here with me in Korea. I'll most likely keep the ACU cloth cover as a keep sake after I get out of the army.
From the movie poster.
And my helmet.