A main thing in American film - it's happy-end. Because American are so sensitive. If hero will die - they'll cry. All American like to cry. Even American president cry. Though in whole world the men never cry, because they're MEN. But American men - aren't normal men.
Just see - which are the popular films in USA. Mostly - its the films with a shooting, fight, murders, violence, pornography. And then Americans are surprised - "Oh, why my kid went to a school with gun and kill there many schoolboys and teachers".
Tom Cruis said in a interview - "I will live with my kids outside USA, because I'm afraid, that my kids will be killed here". But this actor take a part in all these films, that were made in Hollywood. He want to earn a lot of the money and do as typical American.