I haven't seen Iron Man yet, and I haven't read the comics, so feel free to take this whole post with a grain of salt or just skip it, but I do think I understand why the critics are saying it's refreshing to finally have an adult superhero. I think some of those comments come from the fact that Iron Man seems the most emotionally adult character of all the superheroes we've been given thus far. I love Batman, but he & Daredevil are brooders (at least in the movies...I don't read the comics), and there's something very "James Dean-esque" that evokes a certain adolescent state of mind with brooders. You know, the whole, "no one understands me" schtick. Wolverine also has a bit of a "Rebel Without a Cause" thing going on. Tony Stark may be a middle-aged playboy, but mentally and emotionally, he's very much a man. Things happen, he deals with them (instead of dwells on them), and he moves on. He's devoid of melodrama, and there's nothing "emo" about him. He's not still caught up any events from his childhood (I'm sure being the son of a weapons tycoon responsible for the deaths of millions wasn't all peachy.). He also doesn't have an elderly mentor figure hovering over him to offer sage wisdom and pick him up when he falls, ala Alfred or Aunt May. He's a man of action who makes his own decisions. Which is why I think so many critics are finding this "adult superhero" so refreshing. He's not the first superhero who's older than a teenager, but he's the first one who is truly an adult.