Okay, so I saw Black Panther!
This is a spoiler thread, so... spoilers.
And because I'm me and I haven't organized my thoughts into any kind of order, bear with my scattered thoughts.
Overall, I liked it. I think it takes after Winter Soldier in that it's a story with superhero elements rather than a superhero story. There was a greater emphasis on character motivation and the politics of Wakanda than there is on all the cool stuff T'challa can do.
T'Challa himself did not disappoint me. (I like him in the Avengers: Earth's Mightiest Heroes cartoon and he got a great introduction in Civil War.) He's only just become king in this movie (seriously, he's king for all of, like two or three days), so a chunk of that time is spent sorting out what kind of king he wants to be (well... "time spent" in the midst of everything else happening). He's honourable, desires to do the right thing, respects tradition, and recognizes when he's in the wrong. The only downfall on his character I noted was an OOC moment in which he was definitely about to kill (or at least maim... but my money's on "kill") a bad guy. Considering that he spared Zemo even though he spent all of Civil War wanting to avenge his dad... his near-murder of a guy here seemed very out-of-place. Besides that, he had promised to bring this guy to Wakanda to face the music.
And he nearly killed him in public, surrounded by a crowd and recording cellphones.
Erik Killmonger is a better villain than most of the ones we've seen. I'd even say he's probably the second-best. He's got a clear motive that's something other than "I want to rule the world" or "I want to be rich" or "I hate the hero, so I'm going to beat him". He wants to set right an evil in the world; the problem is that he goes about it in very much the wrong way. His backstory sets a good foundation for his motives on a personal level. The main (if not only) thing I wish they'd done differently was his choice at the end: I wish he'd accepted the offer of healing, rather than death, so that he and T'Challa could mend what their fathers had destroyed.
Ulysses Klaue was more of a psycho than I thought he'd be, but I'm okay with it. Andy Serkis is good at playing characters that are a little off their rockers.
I think they should have kept him around longer though. Not sure how else they could use him, but considering the amount of comic material, there'd always be something.
Everett Ross (CIA agent from Civil War) has a larger role here, but he's definitely at the tertiary level. He was an interesting character, particularly during the climax. I'm thinking that there may be a chance that the MCU will mange to work toward the comic book friendship between him and T'Challa, what with how much he now knows about Wakanda but is still keeping on the down-low. (In the comics, T'Challa trusts Ross so much, that he even makes him regent during his absence!)
Shuri (T'Challa's sister) is smart, but she's got teenage sass that makes her both kinda annoying and funny (excepting the part where she flips her finger at T'Challa). Not sure she's a teenager though. She acts like one but looks like she's in her twenties.
Nakia (T'Challa's ex-girlfriend), I think, seems to have a smaller role than I'd expected. That's not to say she doesn't get a lot of screentime. I just mean that she seems to act like a foil to T'Challa and Okoye (general of the Dora Milaje, the royal guard) half the time, since she often provides an opposing perspective. Granted, her views are a definite factor in the story, so she's certainly not wasted. Besides that, her role as a spy and warrior come into play.
M'Baku (aka Man-Ape, but never called that in the film) is another tertiary character that proved interesting. More interesting than I expected, at that! He has a sense of honour (however conflicted) that I didn't see coming (since he was anything but honourable in Earth's Mightiest Heroes). I'm interested in seeing more of him in future films.
The violence levels also follows in the steps of Winter Soldier: pretty intense at times. Cars spinning out of control, flipping, and straight-up shattering; a couple stabbings; a broken arm; charging rhinos (hey, isn't that a Munchkin card? anyway); a sliced throat... yup.
The spiritual elements aren't as prevalent as I know they could be and yet cropped up in ways I didn't expect, so this is a heads-up for anyone who is turned off by that. They make it very plain that Wakandans worship gods (the panther tribe worship Bast) and the ancestors (indicated by intonations of "praise the ancestors" and drug-induced visits to the "ancestral plane" where they can communicate with the spirits of their departed beloved (these scenes are reminiscent of that scene in The Lion King in which Mufasa's spirit tells Simba to remember who he is)).
And, I just have to say it, the second post-credit scene got me fangirling because we get to see Bucky!! He's still just got the one arm, though Shuri will outfit him with a new one before Infinity War. He's presumably free of Hydra's programming too, since he's not only thawed and awake, but not in any kind of Wakandan facility. The one downside to this scene was that half-man-bun.... I'm also starting to question my thought of Bucky taking the Captain America mantle if Steve Rogers dies, because in this scene, some kids call him "White Wolf", which is a comic book character. White Wolf is apparently T'Challa's adopted brother and specializes in spywork and such. This could work out for Bucky, considering his past and his current connection to Wakanda. Much as I'd love to see him take over as Captain America if Steve dies (which I would mourn!), I think I'm also open to a White Wolf version of Bucky.
Those are my thoughts for the time being. I'll probably think of more later.