Here's the thing - I grew up reading Iron Man comic books. Somehow, Stan Lee came up with fascinating artwork, story lines and character development of Iron Man and his various enemies. He did it with low resolution printed pages. He did it every month.
Now we have high res movies with seemingly unlimited CGI and years in between to create them. The first two were solid successes. IM3 managed to fall short. The character of Tony Stark, billionaire bon vivant has peaked in its development; he's rich popular smart with access to many women but with a soft spot for Pepper Pots. Done. This time the writers added anxiety attacks. That was their best shot?
We have seen Iron Man. In IM2 we saw Jim Rhodes be an Iron Man. In IM3 it seems the next phase is more Iron Men. Jim Rhodes, the Mandarin, Pepper Pots, even unmanned drones all become Iron Men/Women. Are we done? Amazingly, it is Tony Stark who lacks the Iron Man through most of the movie. We see a low battery version, a partial arm/leg version, a dead dragging through the snow version. I kept thinking, "Y'know what keeps going though my mind? Where's Iron Man?" (BTW, the best line of the movie for me is Tony Stark, "Y'know what keeps going through my mind? Where is my sandwich?"). Also, don't miss Stan Lee's cameo as the judge in a beauty contest.
All this aside, go see it. Fun. Mindless fun.
daddio