The Avengers (2012)
Super fun. Playing to the promise given in a post credits sting from Iron Man 4 years earlier The Avengers bundles all the previous Marvel Studios characters together for an exciting, funny couple of hours.
Everyone gets a good bit of business (Hawkeye probably gets the short straw, having little chance to show any kind of personality) though it skews towards Downey Jnr's Stark for sure, giving him the final hero moment in a sequence filled with them.
The ensemble work is great but little bits of pairings bring the most joy, a Stark/Banner 'bromance' has been the source of many an online meme.
It's a touch long, some (very decent) fights scenes going on a beat too much and the climax is given one twist too many when some people are just happy to blow up New York for...reasons (potentially, though certainly not directly referenced, Captain America Winter Soldier irons this wrinkle out a tad).
Precisely how I want my super hero movies to be. Silly without being slight, it has emotional stakes but never takes it eye off of just being enjoyable.