On the one hand, it's good that they found a way to make Iron Man mortal. But then again, I kept waiting for Stark to don the armor and kick ass, but that's not really how it unfolds, even in the climax.
Anyway, I liked Iron Man 3, and I'd recommend it, but it's not by any means a better movie than either the first Iron Man or the Avengers. It's probably about on par with Captain America--which is good, but maybe not game-changing.
Final thought: Rhodey gets to do almost nothing in this movie. So at this point, I'm totally ready for a stint with Rhodey in the suit as Iron Man, ala the '80s West Coast Avengers. There's a whole unexplored plot line there, trust me.