One of the most "film-film" comic book movies.
I know that sounds pretentious as hell, but I don't mean it to be. I love me some MCU. I have ZERO against the more bouncy and colorful comic books films. Hell, some are among my favorite of all time (Avengers 1 & 2, Guardians of the Galaxy, Iron Man, Superman: The Movie).
What I mean is, The Wolverine offers an amazing counter-balance to the more outlandish comic book films I didn't even know I wanted. It has a quiet, purposeful pacing and serious tone that does a near perfect job of grounding this world while still making us buy it's more fantastical elements. Almost every side character feels well-rounded enough to standout as more than just canon fodder or thin villains and ally's. The action is intense and never overblown or too drawn out (I know people have issues with the final battle, but I simply don't agree), and at the end of the day the film has the balls to make the hero essentially lose the big fight at the end. He doesn't deal the finishing blow to the villain, he merely finishes what the villains daughter started. Not even the ending of TDK has Batman lose in the way Wolverine loses. It's not about Wolverine coming in and saving the day. It's about Wolverine saving himself.
I think this one of the most underrated comic book films ever made. I'm surprised Fox had the balls to greenlit a Wolverine film that is largely a drama more than a full-throttle action film.