I've known for a while about RedLetterMedia’s extended takedown of the Star Wars prequels, although I only just this weekend got around to watching them. They are, first, laugh-out-loud funny, and second, very insightful about the elements of good storytelling, how the original trilogy excelled at them, and how the prequels fail.
The review of The Phantom Menace comes in seven parts, and the review of Attack of the Clones comes in nine parts. To get you started (content warning: bad language):
My apologies to whoever linked to this originally. RedLetterMedia has also reviewed most of the Star Trek movies and Avatar