I know Hush isn't liked among many, so I recently re-read it (Absolute style) and I think the art is is stunning, and the story is great. This was the book that brought me back to comics, so I'm obviously biased. I also think the Hush: Unwrapped version is awesome to see, like a smaller Artist's Edition.
With all the Before Watchmen stuff I re-read the original series (second read ever). While I can appreciate the story and what the creators do in terms of the mirroring of pages, etc, I just felt it drags on forever. I know I'm the minority, but it wouldn't be in my top 10 all time list.
I know I'll get disliked for this one...Arkham Asylum by Morrison. I have tried reading it twice and could not get into it. To me it had elements of Hush where you see tons of his rogues gallery that I thought I would enjoy, but just didn't. Even listening to the CGS episode I was surprised how much everyone really enjoyed it. I wasn't really a huge fan of the art, and I thought the story was pretty bland. Again I know I'm in the 1% that doesn't like this story much.