I thought the jokes were kind of overdone in the first, especially with Tony. I think the previews misrepresented Ultron, as in he was much more of son of Tony, and you can see that in the character (one of the few things I liked about Ultron). But I thought that both movies had more misses than hits with the comedy. I actually though the chemistry with Hulk/Black Widow worked really well (for all its awkwardness) , it's just that it came out of nowhere , especially after Cap/Winter Soldier. I still thought that the action was well done, although the Hulk/Iron Man fight started to get on the destruction porn train.
I don't even mind the destruction stuff because i grew up on 80s and 90s action flicks and this seems to be a new criticism of action movies and I also know that all of the destruction in the marvel movies will lead to superhero registration act more than likely.