One detail I liked about Iron Man 2 was how much better Don Cheadle was than Terrance Howard. I bought Cheadle more as a career minded obediant duty sworn military man than Howard was in the first film, and with the War Machine conflict straining their relationship, I think that Cheadle was a better fit.
That being said, this clever signage just sums up what I thought so well.
Little known fact that aside from Favreau reportedly saying he didn’t enjoy working with Howard, Terrance was the highest paid actor on Iron Man. At the time he was coming off his Oscar buzz for Hustle and Flow, and when they announced RDJ for Stark the speculation instantly wondered if he was going to stay sober long enough. He has, but back when Iron Man was first casting, it was a valid concern.