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.
YMMV: Captain America: The First Avenger
Alternative Character Interpretation: Colonel Chester Philips (the Tommy Lee Jones character) - when he thought Captain America/Steve Rogers was dead, was he actually upset about the fact that a man may have died in vain - and with him many other men - or was he just mad because Cap snuck out under his watch meaning he could very well have lost his career? For that matter, was there any real merit in his request to have Cap kept in a lab to see if a new version of the formula could be extracted from him or was he just being a bully taking his frustration and resentment out on someone who didn't deserve it simply because Rogers wasn't HIS preferred choice for the serum?
Alan Silvestri's Captain America March just makes you wanna stand up and salute something. The full thing is finally heard over the credits while numerous wartime propaganda posters appear. Let's hear it for Captain America! (Too bad it wasn't included on the soundtrack album...) How awesome is it? This is the only theme from any of the other Marvel Cinematic Universe movies to turn up in The Avengers (in part due to Silvestri being the first composer to score two of said movies).
Complete Monster: Johann "The Red Skull" Schmidt is a bastard in his own right, which shows in killing people for no real reason even after he gets what he wants, having no loyalty to anyone but himself(even being The Starscream to Hitler), planning to annihilate all 'enemy' cities including his own capital, having POWs used in torturous experiments and planning to rule the world as the God he fancies himself as.
Demonic Spiders: The Hydra mooks with the arm-mounted flamethrowers. Cap is forced to yield every time they appear, regardless of how much ass he was kicking prior.
He also wants to kill Hitler and take over everything he has. That's pretty cool in itself.
Seriously? He's a Nazi Supersoldier Mad Scientist who glorifies the Norse Gods. He's the coolest character in the movie.
In a lot of ways, he's like M. Bison from the Street Fighter movie. Of COURSE!
Germans Love David Hasselhoff: Although Marvel and Paramount offered simply The First Avenger as an alternative title for countries requesting it, only Russia, South Korea and Ukraine took that option. All the others, including China, settled for the original title for the film instead.
Harsher and/or Heartwarming In Hindsight: Captain America's co-creator, Joe Simon, died about five months after this movie's release, but its box office and critical successes likely helped re-assure him of Cap's lasting value before he passed away.
Some fans speculate that Red Skull had actually been temporarily banished from the mortal plane than killed. The fact that the way he was disintegrated was similar to the Bifrost travel in Thor supports it; and if you look closely at the ceiling when the Red Skull first grasps the Cosmic Cube in his bare hand, it temporarily warps to a star-filled view of the same interdimensional void that the Bifrost travels through and that Loki falls into.
It should be noted that it's unlikely that he'll return to the regular plane of existence, assuming he survived, as Hugo Weaving stated that he's not likely to return to play the character in future films. On the other hand, he's not exactly going to come out and say that Schmidt's Not Quite Dead & will be back in any future films.
Bucky, in following with the comics. They never did find his body in the film, after all. In addition, in the scene where Captain America finds him, he is strapped onto a bed, implying that they may have done some sort of experiment on him or at least planned it.
Add to this the fact that Sebastian Stan signed a six-picture deal with Marvel Studios, and the official title for the sequel is none other than Captain America: The Winter Soldier; which is both the name of the storyline which revealed Bucky was still alive, and the identity Bucky takes before & after his stint as Captain America.
Hilarious in Hindsight: Considering how Hugo Weaving made the phrase "Mister Anderson" memetic, they had a golden opportunity for him to address Captain America derisively as "Mister Rogers". We can only assume they didn't because the scenes where Cap and Red Skull meet aren't the best times to slip so spectacularly hilarious.
Some found it hilarious that Stanley Tucci and Toby Jones played rival German scientists in this film, then a year later found themselves announcing the 74th Annual Hunger Games.
Iron Woobie: Cap. You can tell he's sad about waking up after most people he knew were dead, but he won't let that get in his way.
Launcher of a Thousand Ships: The title character himself. He's shipped with Peggy, Howard, all of his Avengers "love interests," Bucky, every single one of the Howling Commandoes...Super-Soldier's a super-suitor.
When Johann Schmidt rips his face off, revealing his true face.
The Problem with Licensed Games: Actually, it's not that bad! While rough around the edges, and saddled with a slow, uninteresting beginning, the Captain America: Super Soldier game clearly is more than just a meager cash-in like the Thor or Green Lantern games; it's got an imitation of the combat system from Batman: Arkham Asylum and a really huge castle full of HYDRA goons to explore. It's not quite as good as Arkham Asylum, but imitation is the sincerest form of flattery.
In fact, in the preview of the game, one of the designers even lampshaded this trope and explained that they planned to subvert it.
Uncanny Valley: In the early scenes, it's quite obvious that the Red Skull is wearing a Hugo Weaving mask over his mutated face. The effect can actually make him look far creepier than his true face ever could.
The make-up for the Red Skull is fairly impressive too, especially the Hugo Weaving mask he wears, which has semi-obvious neck flaps and red areas around the eyes which make it more realistic.
Never mind that, what about the fact that 90% of the film is in-camera effects?
What an Idiot: S.H.I.E.L.D. surprisingly. Trying to ease Captain America into the present day with a fake 1940's hospital room and baseball game on the radio can be excused. The fact that they didn't take the time to make sure the game was from after Steve crashed cannot.
WTF Casting Agency: Apparently Will Smith was one of the top choices to play Steve, at one point.
Quite a few people even had this reaction after Evans was cast in the title role after his stint as a certain other Marvel Comics character, but he's since been able to quell those fears.