Even though RDJ's portrayal of a superhero was a little over the top for me, I still liked Iron Man -- the gay content, not so much.
In Iron Man, RDJ plays a rich arms dealer (he owns a company that manufactures high tech missiles) who, after being kidnapped in a rogue country, is forced to rethink some of his values and actions. Cute.
While being driven in a military convoy to this site where he was going to make a demonstration of the latest weapon developed by his company, RDJ acts all surprised when he realizes the driver is actually a girl -- not so nice to the butch looking ladies. Later into the movie, RDJ makes a joke with real life homophone Terrence Howard -- something about Terrence going out with a tranny or something like that. Very derogatory. Not nice.