These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
In the Brian Michael Bendis series, he takes on Count Nefaria (a Thor-level supervillain) several times and eventually succeeds in removing him as the kingpin of Los Angeles. He does this largely by enacting schemes that would be insane to try and by listening to the voices in his head (granted, those voices are Captain America, Spider-Man, Wolverine, and Echo). Unfortunately, the real Echo was killed in the attempt.
He also allows Count Nefaria to beat the crap out of him in a police station to give the Avengers time to arrive.
In the Warren Ellis series, his craziness has looped itself so that he's now one man (Marc Spector) and four incarnations of Khonshu, including "Mr. Knight" (a dapper white suit), a traditional crime-fighting outfit, and an anti-magic suit with—in Ellis' own words—a Giant Fucking Bird Skull for a helmet.
Ensemble Darkhorse: Out of all of Moon Knight's personalities/incarnations, the currently most popular seems to be his "Mister Knight◊" persona due to how freaking cool it looks.
Growing the Beard: After he stopped battling Werewolf By Night and became his own character.
Holy Shit Quotient: The ending of the "God And Country" arc in the Benson run, with Moon Knight being forced to kill Carson Knowles to save New York.
Issue 6 of the Warren Ellis run where Black Spectre begins his all-out attack on Moon Knight and proceeds to utterly destroy almost everything Marc throws at him.
Jerkass Woobie: Both Black Spectres. The first one had his life and reputation ruined by his stint as a supervillain than lost his son, driving him insane and sending him on another rampage. The second one is so desperate to be unique and special like Moon Knight he becomes a supervillain.
They Changed It, Now It Sucks: Has had this from time to time with different factions of his fandom having less then favorable reactions to certain revamps in his personality and character direction.
The Woobie: Being a superhero with multiple secret identities has driven the poor guy into borderline insanity and he's constantly having to resist Khonshu's attempts to twist him into a Knight TemplarBlood Knight. He's considered C-List Fodder by most of the other superheroes and supervillains and is extremely lonely, to the point of begging to be part of the Avengers once. And then Echo got killed which almost sent him hurtling over the Despair Event Horizon. In short: it sucks to be Moon Knight.
Marlene and Frenchie. They stuck with Moon Knight for years despite his fluctuating mental state and suffered through terrifying ordeals before cutting off ties with him. Even worse for Frenchie, as he was actually in love with Marc, but Moon Knight's single-minded dedication to his work and instability meant he was unable to ever reciprocate.