I didn't really like [i]Blue Valentine[/i] and consequently didn't really have high expectations going into this necessarily. It's certainly messy and imperfect but I still liked a lot about it almost grudgingly. I really love how it builds and expands in scope and ambition as the film goes on. I also really really love that what Cianfrance seems to be going for here is the stuff of classic tragedy... fathers and sons, the inability to escape one's past and how…