Can't complain about anything; unequivocally deserved Best Picture

Rating: 9/10 (23 November 2017)

This movie is unorthodox in so many ways, but it works so brilliantly. From the random drum beats in the credits to the levitation and telekinesis, you will be confused and entertained. The writing/dialogue is excellent, accompanied by awesome performances by Michael Keaton (the original Batman), Ed Norton and the others. Also, if you had any questions about the title, watch the movie and you'll understand.
Keaton plays a sort of veteran actor in a world full of real celebrities (Clooney, Renner, etc.) where he is desperate to get his career back on track by performing in a play involving love and cheating and the like. He is haunted by the inner voice of his past self (as Birdman), who insults and enrages him on multiple occasions. This inner voice, even though Riggan (Keaton's character) hates it, motivates him to get up from his low points in the film (e.g. sleeping on some stairs using a plastic bag as a pillow after drinking a pint of whiskey). The voice also makes him hallucinate about returning to Birdman (you'll see what happens). Keaton also puts conviction into these frustrated moments, whether it's towards life or someone else (like Norton's character, Mike or Tabitha, a reviewer, whom he hates). He portrays the struggling actor very well (earning him a Golden Globe win and Oscar nomination, both deserved) with enough raw emotion to be realistic, but not melodramatic.
Norton (how this man has not won an Oscar in his career is insane) also fits his role as Mike amazingly - an egomaniac who doesn't want anyone to control him. He does and says so many weird and out-of-the-blue things, but they add to the character, showing you why the other cast members hate him. Granted, Mike is a good actor, but he's uncontrollable. He gets beaten up by Riggan for stealing a spot in the NYT, where Riggan convincingly proves his acting ability. Mike also teaches Riggan about some parts of life (like Riggan's internal voice) and almost embodies cynicism. Emma Stone (Best Supporting Actress nomination for this, which is fair) also works unexpectedly (given she typically plays friendly characters) well as his estranged, drug-addicted daughter who, like Mike, lashes out at Riggan about him being a poor father and how low she believes his life currently is.
The camera work is also very crafty, appropriately using slow transitions and rapid swings, mainly between characters. Riggan flying and moving stuff around with his mind is fun to watch. It was great to see Zach Galifianakis get away from his usual light comedic roles and, like the others, swear, be angry and uptight as Riggan's mate and produce. Also, low budget. Yes.
I really cannot think of anything to call poor; I just think that some may not like its unorthodox nature.