This came up on the John Lovell show but it's something that's been in the back of my head for a while. The cloud can be altered but your DVDs and hard copies, not so much. Even little things like if you stream "House MD" you might not get the same soundtrack that it originally had because of rights conflicts. Sadly Malcolm in the Middle never made it to DVD other than the first season.
So what TV shows and movies and books are must buys for your personal library?
The three Lord Of the Rings movies extended editions is a big one for me. Liberty's Kids is another one.