I think Quinto's Spock is fantastic in that it's a younger version with a different history. I can see them as two sides of the same core personality. As with many things, though, moreso when you just look at TOS. TOS Spock was a bit of a dick, but much more in control. By the movies and especially the TNG era he had become far far more mellow and less snarky.
True. Perhaps I was a little harsh. I certainly know what they're going for in playing up certain aspects of the character, to start him at point A and take him to point B.
But I think having those aspects in TOS worked because the show was fundamentally different in style and storytelling. In JJ Trek there really aren't moments where you can truly appreciate Spock's philosophy, scientific knowledge, etc. That's why we grow to like him in TOS and the older movies.
In the new ST it's just Spock being hyper logical and having a hard time breaking rules. In my opinion, taking out the "science-fiction" and cerebral aspects of ST makes the character of Spock a much more difficult sell, if that makes sense. It essentially limits the playground in which you can play with the character.