I'm really enjoying Superman Unchained, even more than I expected. Issue 3 was the best issue yet.
For much so that I wrote up a piece (backofthehead.com) on the most intriguing thing to me about this Superman story Scott Snyder is telling and how much more I want to know about the Untold History of The New 52.
Monthly comics are metaphorically more like cassette singles, whereas graphic novels are like LPs. I think there'll always be long-form trades or OGN's but I really think monthly comics are coming toward an end, at least from the big two.