This wasn't so much an Iron Man movie as it was a Tony Stark movie, and it failed at doing even that right.  His PTSD is utterly un-addressed but heavily used in the plot*.  We aren't told anything meaningful by the epilogue other than "Tony fixed Extremis, yay".  The suit isn't a part of him, it's a convenience for the plot and an excuse to do flashy FX scenes, to the point I honestly wondered why they bothered using the Mk 42 most of the time instead of having him switch it up once or twice in the film before the "form rush" at the end.

Also, am I the only one who feels like they tried to be a little too funny?  When Pepper fell I was juiced for a raging brawl, instead I get the Prodigal Son Mk 42 splattering all over the place with an out-of-place (albeit in-character) bemoaning.  Or the 42 getting hit by the truck?  Or literally every scene with Ben Kingsley not "in character"?  It seemed like half the comic relief was in odd places that were less funny and more undermining the scenes previous and following.

Also Rhodes was a little too useless.  I wish we'd've at least seen him mix it up a bit with the other suits against the Extremis soldiers.  But with how dangerous those guys were to the suits, I suppose at least him not getting in the action made some sense.

*If this gets used in a meaningful way in Avengers 2, then I will forgive this oversight in a heartbeat.

k not really but srsly it's a decent movie.

I mean, if this episode had been done last season, I feel like we'd've gotten to know the bride pre-possession, in order to get us attached and make killing her carry a little more emotional weight even though we know she's beyond saving.  Here we just got Ryuga kicking ass and taking names, with no real weight or meaning to any of it outside of "This is our protagonist, ladies and gentlemen!"