Near perfect

Rating: 10/10 (26 April 2019)

This isn't a perfect movie, but it's closer to a 10 than a 9 for me, hence the rating. Also, I feel the need to offset reviews that are low for no reason other than the writer's lack of understanding of the Marvel universe.
There's little worth saying to convince anyone to go see this movie - you can nitpick all you want, but you are guaranteed to be entertained. If you're remotely committed to the MCU, you simply can't miss out on its conclusion, which I found truly stellar. There's enough to love that everyone will have their own favorite 10-20 moments.
I'm seeing a lot of hate surrounding three major plot elements: Captain Hammer, Chunky Thor, and Professor Hulk.
Captain America wielding Mjolnir is well-established in Marvel comics, and was teased in Age of Ultron. They've been setting it up for years, and to be honest, seeing it in action has been one of my greatest wishlist items in the MCU. The hammer's inscription reads, "Whosoever holds this hammer, if he be worthy, shall possess the power of Thor." That's why Cap is suddenly imbued with the powers of the god of thunder. Surprised to see so many "long-time fans" in the reviews section here who felt this came out of left field.
This version of Thor was a surprise, to be sure. After establishing his character as one who can suffer loss after loss (parents, love, home, brother) and still keep up the fight, seeing him go full Lebowski was a bit of a shocker. However, I don't feel it's unforgivable or unexplainable. He takes personal ownership for the loss to Thanos more heavily than any other Avenger, and it's quite an assertion to say that bearing the weight of the deaths of half the universe wouldn't break him. At worst, this was an unpopular character development choice. At best, it's an exploration of how an Asgardian's best can fall prey to the weakness of the humanness he's come to surround himself with.
Professor Hulk...was probably my only gripe with the film. I've been itching to see Hulk at his fullest strength, and boy did that fall flat here. I was extremely happy to see Banner back in the green, but I've not personally read any of the comics where Banner and Hulk co-exist in this way, assuming such comics exist. Also - at no point in the movie did it seem like there was an advantage to this arrangement - they either needed Banner, or they needed Hulk - never did they need "both". Side note - I wanted desperately for uncontrolled, savage hulk to be unleashed when The Ancient One ejected Banner's astral form.