Random offseason post, for anyone interested:
A while back, someone uncovered a live commentary of Iron Man 1 with RDJ and Jon Favreau. There's no commentary on the Blu-ray, so this was the only equivalent. I gave it a listen and decided to check out all the commentaries for MCU films, leading up to Infinity War's release.
In my mind, commentaries come in 3 flavors.
1) Stories and anecdotes about the actors and extras
(Incredible Hulk, Guardians 1 and 2, Iron Man 3, Ant-Man)
2) How things were filmed - what's CGI and what isn't, etc.
(Iron Man 1 and 2)
3) Why the story went a certain way, or the thought process behind the film
(Captain America trilogy, Thor, Black Panther, Avengers 1 and 2, Doctor Strange)
Of course, most are kind of a mix. James Gunn talks a lot about his friends and cameos but also some storytelling decisions. The Ant-Man commentary talks a little bit about the various previous versions of the script, but tactfully sidestepping the whole Edgar Wright thing pretty well.
Scattershooting:
1) The Thor Ragnarok commentary is BSC and very entertaining. It's just Taika Watiti doing a solo act. The first 1/3 is him going full comedy, the second 1/3 he starts talking about the story decisions and artistic vision, and in the final third, his two year old daughter comes into the room and adorably throws a wrench into the whole thing.
2) My appreciation for Thor 1 and Black Panther went up after listening to the commentaries. Kenneth Branaugh and Ryan Coogler share a lot about what it took to adapt these comics to film, including various influences and story decisions. And the Russo's and their writers do the same in Cap 2 and 3. Very, very insightful.
3) On the other hand, I think my stock is trending down for Iron Man 2 and 3. Jon Favreau admits that the way Tony discovers the new element in IM2 doesn't make much sense, but they wanted to tie it back to his father somehow. To me, that's disappointing. I don't want a filmmaker shrugging his shoulders like that at a film's turning point. And for Iron Man 3, I thought Shane Black and his cohort (writer or producer, can't remember) thought their story was a lot more profound than it actually was.
4) The Thor: the Dark World commentary is interesting because it's 50% Kevin Feige, 40% Tom Hiddleston and maybe 10% Alan Taylor, the actual director of the film. I thought it was telling how little he had to say about his own film. I know he's complained about studio meddling before, but I think that guy's just a spare. Emilia Clarke thinks so too. Also as I recall, they had to fly Joss Whedon in to fix the script and tell them to add more Loki, so... that guy's a spare.
5) It wasn't too off-putting, but James Gunn has kind of a cocky vibe in GotG2, which as a film I felt smelled its own farts a bit too much. There's a bit of "here's a funny joke I came up with here" and things like that. Watiti is full improv but Gunn is actually the opposite. It's interesting.
6) Joss Whedon sounds so defeated and burnt out at the start of the Age of Ultron commentary, and even mentions his shrink somewhere in there. Wtf
Anyway, tldr but there's a commentary recap for anyone who is interested. I'd definitely recommend it most for Ragnarok, Winter Soldier, Civil War and Black Panther. I'll have to check out the Infinity War and Ant-Man 2 commentaries before Endgame.