Remarkable achievement that deserves all the praise and its 2 billion worldwide box office.

Rating: 9/10 (13 September 2018)

This holds up incredibly well upon a rewatch. Now I can safely say that this IS my favorite MCU film and nothing can change my mind (before Avengers 4 arrives, of course).
It's not perfect, but who expected that. The fact that they pulled this off and made it one of the greatest comic book movies ever, is an achievement worthy of an Oscar. Okay its pacing is a bit unstable at times, and sometimes no gap to breath even a little is left between funny and dramatic moments. That's why I actually would have liked this to be even longer. But I don't care because the rest of it kicks ass anyway.
It fixes almost all the major gripes I've had with some of the previous Marvel movies. Generic and bland music? Alan Silvestri's soundtrack is a killer. Pretty unremarkable visuals? Seeing it in a theatre was some of the most stunning ones I've attended (sure it's not Blade Runner 2049, but no other film can look that good). It has landscapes and locations that left me astounded. CGI was 95% of the time top-notch. ALL of the actors in this possibly the biggest movie cast ever do fantastic job. And the villain? The villain was the best thing in the movie. He sees himself as a hero of his own story, and you kind of get why he does what he does. His plan is obviously wrong and flawed, but that's why he is the villain. Thanos does appear as a sort of protagonist in Infinity War, it starts with him and ends with him. It's his story. Some describe Avengers 3 as a half of a movie, but it's not quite true. In Thanos' point of view it tells a whole story. In heroes' point of view, sure it's a cliffhanger and Avengers 4 is on its way.
Because of the solid work done for this universe this does not need to flesh out characters as we already know them. Nevertheless, this is still filled with character moments that deepens them even more. Almost all the time it was a perfect blend of dark and light even though it's mostly dark. And the ending, oh gosh the ending. Before you start whinging me how it was a cheap gimmick, let me tell you something, it doesn't freaking matter. They had balls to end it this way, they left us hanging for a whole year. And I know Avengers 4 will somehow surprise us (again), because Kevin Feige has shown love and commitment for this whole universe and he won't let us down. This managed to be both surprising and satisfying at the same time. I really think it was the film Star Wars: The Last Jedi should have been (not saying that Last Jedi is bad). All hail Lord Feige!
Avengers: Infinity War is one hell of an experience filled with moments I will never forget, worth the 10 years in the making, and if you 10 years ago told this little kid, that this kind of movie will exist in the future, I probably would think you as a kind of crazy person. It's an achievement that this was made to happen, it will leave it's mark in film history at some form, you just have to accept it.