Why does Thanos respect Stark? Because he sees himself as noble, and is immensely driven, and he sees these things in Stark as well. Both are clearly willing to do anything, willing to sacrifice anything, to fulfill their goals, to see their missions through.
As per the user, the director of Avengers confirmed that Thanos was most scared of Iron Man. “Not because of his strength, not because of his power, not because of his power, but because of his suit,” he added.
But in Avengers: Infinity War, the Thanos who was on the hunt for infinity stones said that he respects Tony Stark. This scene in the film shocked everyone. It happened during the fight in Titan when Iron Man attacks Thanos. The might villain tells Stark that he respects him.
When talking about which avenger the Mad Titan respects above the rest it would most likely come down to Tony Stark or Steve Rogers. In Infinity War Thanos comes right out and even admits his respect for Tony just after they fight on Titan.
The one time we see any emotion from The Mad Titan is on the planet of Vormir in Avengers: Infinity War, where he sacrificed his one true love – his stepdaughter Gamora.
"He's aware of Stark from the original Battle of New York as the person who undid the plan," said Russo about Thanos knowing Stark. The makers also explained the connection between Stark and Thanos in regards to what they want to achieve: a path for a better future.
The directors literally confirm that. the Avenger Thanos is most scared of is Tony Stark. Not because of his strength, not because of his powers, not because of his suit, but because his intelligence. That is why Thanos says.
Favourite characters
“Iron Man” sits at the top of the list of most popular Marvel movies, and incidentally, the character played by Robert Downey Jr. is also the most popular. With 62% of votes, he comes ahead of Spider-Man with 66% and Captain America with 61%.
Right now, it is Star-Lord. Because in Avengers Infinity War the heroes had Thanos subdued, and were only seconds away from pulling the Infinity Gauntlet of him. But when Star-Lord found out Thanos killed Gamora, he lost his temper and started hitting Thanos in the head.
Tony Stark's biggest fear: Failure to protect the world and those he loves.
The theory posits Ego, Odin, and The Ancient One as three of Thanos' greatest fears, and he waited until all of them were dead to make his move. This would make sense, as all of these characters were massively powerful and had strong ties to the Avengers, which meant they could be called in for backup at any time.
Despite being a selfless hero who saved the world more than once, Tony Stark has made mistakes that have caused those around him to pay the price. Some actions of Tony's were deliberate, some unintentional but there were also times he was an unsuspecting victim of others' projected insecurities.
Iron Man snaps his fingers and dusts Thanos out of existence, finally ridding the universe of its biggest threat. Unfortunately, that comes at the cost of Iron Man's life. At long last Thanos is finally defeated, albeit for good this time.
While Thanos is an Eternal and has the standard powers of super-strength, agility, regeneration, immortality, and more, Adam Warlock takes the upper hand. He can be killed, but he resurrects to be stronger every time.
Elizabeth Olsen and Benedict Cumberbatch agreed that Chris Hemsworth is the most handsome MCU hero.
Tony Stark's best friend, James Rhodes, is one of the few to wear the Iron Man armor, other than Tony Stark himself.
Thor. Blessed with the powers and long life of a god, Thor was undoubtedly the most powerful member of the initial version of the Avengers. Not only can he fly and transport between worlds, but he was also the only one capable of taking down Thanos, even after he had assembled all six Infinity Stones.
2 "I am inevitable."
This phrase caused fans to panic when they thought Thanos had won yet again, making it one of the most memorable quotes from Endgame. Thanks to Tony Starks quick decision and bravery to remove the Infinity Stones and respond with a cooler catchphrase that ends the MCU's Infinity Saga.
Tony's nightmarish vision saw a triumphant Thanos sitting upon his throne in the cosmos, with the Avengers defeated and scattered at his feet.
They finally met in Infinity War, in which Thanos slaughtered half of the Asgardian refugees, among them Heimdall and Loki. Thor developed a great hatred for Thanos for killing the few people he had left, vowing to kill him even while incapacitated.
Thanos can be seen fighting the Avengers, making quick work of them, and disposing of them easily. One of the casualties is Iron Man, who gets ripped in half as he tries to face Thanos.
Thanos' IQ is over 9000.
If you have knowledge of too much (or everything), you know the truth about many things and that can be depressing. So, knowledge can be a curse which is shared by both Thanos and Iron Man. Iron Man got to know the fate of world during Age of Ultron (after which he created Ultron) and Thanos is just fulfilling it.