I've really liked Aquaman and Earth 2.
Other than that...I've tried a lot of the books that I had a modicum of interest in; I think I've said before that I did enjoy the Simon Baz issues of Green Lantern once I stopped being horrified at how stupid his origin was.
But for me...see, I don't think you can truly answer this question without looking at what has been lost.
There isn't a single thing in the revamp that was worth the loss of Wally West, the Infinity, Inc. generation of heroes, Black Lightning's children as heroes in their own right. The loss of the New Teen Titans era, which also featured the Titans/Deathstroke rivalry which lasted for years and was actually a theme that could've been mined further by talented creators, was also lost.
So. I don't mean to take anything away from the New 52. DC has the right to make changes, and I've tried a number of the books.
But nothing they've done was worth what they lost. They sacrificed their history, a huge chunk of the great things that had done, for sales. That's what they did. And they got their sales increase.
What they lost...is far greater, in my opinion.
*Sniff, sniff* "Damn it, Diana...If I'd known they would trade us in for a JT Krul-written Captain Atom and "The Savage Hawkman," I'd have let Superboy-Prime destroy all reality.""Superman flies and is really strong...what the fuck else do you need to know?!"
-- Hitler, expressing his displeasure about DC rebooting and complaints about continuity