Pillion
It doesn't know what it wants to be. Wants to be as meaningful and sentimental as Mysterious Skin, but also as vulgar and explicit as Secretary, but but also comedic, lighthearted, and romantic.
Don't get me wrong it tries something new and this genre needs some innovation, but Pillion just ends up failing to have its own identity, rather feeling like a melting pot of incohesive ideas.