The first Iron Man was great. The second was pretty good, this is in the dirt unless you like the cartoon humour. Personally, I don't like seeing people bounce around like they do in animation. It's a film with people, it needs to have ground rules.

Also, the story line is very weak. It's like they tried to make a sequel but they didn't know what they were doing and improvised a half chewed script. There is no depth or complexities to the story. They had one goal and that was doing something with Iron and and his girlfriend. I won't spoil it for you, in case you still want to watch it. But I advise watch the trailer and you'll get the best parts.