A strange movie. It is kind of all over the place with its themes and influences but it has a distinct enough personality and some solid setpieces.
This is a straight adventure story with giant monsters, and the way it's shot and the hammy dialogue are mostly B-movie and comic book derived (check out those Dutch angles and blistering colors and 10 times too big sun, moon, aurora...).
But there's also a clunky Vietnam metaphor that's a straight-up over the top "homage" to Apocalypse Now, et al. The song choices even more so. It makes sense in theory (VietKong anyone?) but I don't think it ever really works and it's just an excuse to make Sam Jackson a bad guy to counterpoint Kong's "human" side.
Characters are fine for the most part. They serve their cardboard purposes and that's what's expected. Hiddleston and Larson in particular feel vastly underdeveloped. Everything they say and do fall instantly from memory and their disappearance from the movie all together wouldn't have changed it that much.
But what we want are monsters and we get them. Most of them are wonders to behold (the water buffalo, spider legs, and octo tentacles yum) except the generic Skullcrawers (the scene where Reilly names them is embarrassing - I don't think Larson or Hiddleston had any idea what to do the dialogue is so ferociously dumb. Reilly almost saves it however).
This Kong feels like a very different movie than the new Godzilla. This is very much an entertaining B-movie with strong comic book influences worn loud and proud. It will be interesting to see how these two worlds collide. If any franchises deserve an extended universe, it's these! That's what they're all about.