Say what you will about the story, but I felt this film has been the best portrayal of Spider-Man's character so far. The wise cracking, how he handles himself around bystanders, his heart, even the little things like stopping to ask somebody's name after rescuing them, the early scene showing him repeatedly taking off the costume with all the gunk and grime, It really captures Spider-Man. His look is also the best so far. I never liked the Raimi costume (personal preference, it is fine objectively), and the first Amazing wasn't, but between Garfield's physique, and a classic interpretation of the costume, He easily looks the best.
Peter-Parker's character did not resonate with me though. the duality of comic book superheroes is a common element, the relationship between Parker and Spider-Man is a balance between the introvert, and the extrovert. Peter would be embarrassed to kiss Gwen on stage, It is by donning his persona that he allows himself to let go of his social fears. I got none of that from Peter Parker. I did like two things here though. The Raimi films kept telling us Peter was smart. This film showed it. After a malfunction of his equipment at the hands of Electro, Peter researches, conducts experiments, tries to solve the problem, with science. You also see, rather than being told, that he is struggling with the consequences of being Spider-Man. This is of course a common theme for Peter, and one that I felt was handled better here than in Raimi's films.
I enjoyed the dialog for the most part. The conversations felt more real/less scripted then most comic book films manage. The villains however felt out of place, or, rather, they felt more 'comic booky' (by which I don't mean like a comic book, but rather like the stereotypical comic book), They bounced erratically from well written to hokey, and their time on screen, and motivations both felt quickly scribbled in and ushered out, so that we never had time to dwell on how shallow they were. The Secret in my opinion to a great comic book movie is a great villain, and so far neither ASM has delivered. Norman in SM, Otto in SM2, even Venom in SM3 were better realized, and presented.
The plot was fine, it really didn't advance anything, it feels like (probably because it is) a meaningless middle chapter. They spend a great deal of time on Peter and Gwen's relationship, which is good, because of the end, but this is a Green Goblin origin movie too, and Green Goblin/Harry Osborn are barely in it. I have heard complaints about the pacing, but this is not an action movie. If judged by the criteria of a tragic romance film, i think the pacing is fine. I guess that is my biggest issue with the plot. It is one part romance, one part tragedy, and it is wrapped up in a super hero action movie bow, but those themes are really difficult to mix well, and this didn't get close.
I enjoyed it on the above merits I found appealing, but I have no real desire to go and see it again.