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.
Awesome Music: The credits theme, an orchestrated piece, is suitably heroic & perfectly fitting for Earth's Mightiest Heroes.
Broken Base: A large number of reactions to the first-released footage of this new series were quite mixed. Some are cautiously optimistic, others aren't sure about the new direction, and others more just flat-out hate it.
Not everyone seems pleased that Avengers from the previous shows such as Black Panther, Hank Pym and Ms. Marvel are not included.
The constant winks that Hawkeye gets from Hyperion in the latter's debut episode, Hawkeye's insistence on wanting Hyperion to join the Avengers, and Hawkeye giving a wink to Hyperion himself when the latter is distracted. Later Hawkeye receives a wink from Thor.
Lampshaded by Hulk.
You like him...because he winked at you?
Inferred Holocaust: In "Depth Charge", Attuma and his army flood New York and the entire friggin' subway system. Despite this, no mention is ever made of any casualties, nor do we ever see anyone outside during the crisis.
Red Skull calling himself The Iron Skull and saying it so proudly. It probably took him all of five seconds to think of it.
Iron man apears equally imaginative with, calling the Doom controlled Destroyer the Doomstroyer.
Black Widow saying "Hate you", and Hawkeye replying with "Hate you more!", whilst both are under the influence mind-controlling nanobots. But really, mind control shouldn't reduce their level of wit to that of 10 year olds.
The flashbacks with costumes and characters designs from The Avengers: Earth's Mightiest Heroes in the episode "Molecule Kid" can be considered an attempt to please fans of the said show. It didn't work- for the most part, it just ended up confusing them even more.
Replacement Scrappy: Falcon. While he isn't necessarily considered a bad character, pretty much everybody agrees he's a step down from the characters in Earth's Mightiest Heroes, especially his predecessors Wasp and Black Panther, who had much more interesting backstories, personalities and abilities. Not helped by how Falcon's integration is very rushed, with very little development: He is introduced briefly as Tony's protegee, comes to help the Avengers, and then get fired by Fury for insubordination only to be recruited in the Avengers as a result the very next second, without any discussion about it between the older members.
Tear Jerker: In "Hyperion", the Avengers each fall one by one from the might of the catastrophically-sized meteor after it reaches Earth's atmosphere. With only Iron Man left hold the giant space rock, he apologizes to his team saying it's just too much for the Avengers to handle, and that Earth is more than likely doomed. The music surprising fits for this rather bleak beginning of the episode.
They Wasted a Perfectly Good Character: Bruce Banner is mostly absent from this show except for "Planet Doom"; this incarnation of the Hulk apparently stays transformed permanently (and unlike in Earth's Mightiest Heroes, no explanation is given why), and, since he lacks the Jekyll and Hyde Split Personality, is reduced to a Dumb MuscleBlood Knight whose most dialogues can be summed up as "Time to smash" or "Give me something to hit". Especially surprising considering this show tries to emulate the spirit of the Avengers movie, which was partially popular because of Banner.
Unfortunate Implications: Twice Tony suggests Sam Wilson take the War Machine armor. While its only intended to make reference to War Machine as a Mythology Gag, it unintentionally comes off as a bit racist when you realize that the only thing that ties Wilson to War Machine is that both him and James Rhodes, WM's usual wearer, are black.