Sirenland at 2011-05-09 11:15:38:
I would recommend watching every film twice: The first time through, watch for enjoyment, revulsion, or whatever natural reaction you might have to it. The next time through, watch for dialogue, shots, story and the elements that explain the natural reaction you just had.
Doing this, I often learn more from bad films than from good ones. Understanding why something works or doesn't work an important part of the process.