"Eraserhead," not my favorite David Lynch. That would be "Blue Velvet" or "The Elephant Man."
If you would not be entertained by Sondheim's wonderful score, you wouldn't be able to get past the story. You might like the stage version, or perhaps Sondheim's "Sunday in the Park with George" is more to your liking. Well, it did win the Pulitzer Prize.
I do go to the movies or seek out DVD's or cable showings that are either entertaining or have a depth of ideas in the story, or maybe even both (you don't see that very often). "The 400 Blows," for example, is both entertaining and also has the most depth of any coming-of-age film (which practically spawned that whole genre).
Tim Burton has always meant to entertain first, but he is an auteur filmmaker as well in that his style is unmistakable. The horror and gore in "Sweeney Todd" is black humor and there are some that might believe the graphic parts are over-the-top. Of course, Mary, Mary, quite contrary, whether or not you've even seen the film. If this is another "I believe because of what the uptight Catholic's opinion" (at least the choir boys have been said to be uptight)" then your opinion doesn't mean much. It's like not voting but complaining about the government.
Not that the Catholics are any better than the Babtists.
You mean to tell me there's nothing decadent about "The Godfather?" Really. I suppose you've woken up beside a horse's head sometime in your life?