Yesterday in one of my classes we had an interesting discussion about the unoriginality film composers tend to have.
The professor used the examples of the themes from Born Free, Lawrence of Arabia, and even John Williams's themes from E.T., Star Wars, and Superman. Although audiences may not notice how similar they are, musicians and composers certainly notices.
Why is it good to be unoriginal? It's easier, of course, and the score will be more likely to succeed (and the film makers make more money selling a nice soundtrack). Whether the audiences realize the similarity or not, they know what they like, and if they hear the same kind of music from another movie they like, their brains will be very happy.
Is this trend bad? Do the composers have a choice? Is it the audience's fault for liking the same old stuff? If you were payed lots of money to score a big dudget film, would you want to ruin your chances of scoring more films by being original and unliked by mainstream audiences?