As much as I love Lynch's debut Eraserhead, in the end I must go with Blue Velvet. I consider the former as the movie that helped Lynch at the same time establish himself as a true idosyncratic artist and as someone who wears on his sleeve the rich cinema history he comes from (mainly german expressionism and surrealism). The symbolism in this movie is handled with such confidence rarely seen in early works of filmmaker's filmography. But still, with Blue Velvet he taps into something not really explored before. In this film he sets up the Americana he is known for and builds on in his future works. And it also makes the case for me because it perfectly goes with the renewed Twin Peaks TV show. What better way to introduce its fans to other works of this one of a kind director?