Honestly, it took me three tries to get through this movie once. It kept putting me to sleep.
The cast do everything they can to make their scenes entertaining, but Iron Man 2 is a just an absolute waste of two hours and $200 million. 1: The stupidly integrated villain Ivan Vanko who is given no backstory or true relatable motive (even Mickey Rourke was pissed at how his character was handled). 2: The pointless subplot of how Tony Stark has to create a new element to save himself. 3: The sloppy introductions of both SHIELD and Black Widow. There's very little here that is of any actual entertainment value, or at least to balance out how tedious the whole movie is to watch. No wonder why Jon Favreau left to make more personal works.