I know the whole Mass Effect 3 thing has been done to death, especially the ending, but this video talks about many aspects that other people ignored. It focuses more on design elements of the game. There is a section about the ending, but it doesn't really dominate the piece. Check it out.
http://www.youtube.com/watch?v=8M-jtGoYX_Q
http://www.youtube.com/watch?v=8M-jtGoYX_Q