In one of the later books, Hermione even makes mention of this by stating that the Sorting Hat was heavily leaning toward placing her in
Ron Weasley
Being Harry Potter's best friend certainly needed heaps of bravery – hence the Sorting Hat not messing around in sorting Ron into Gryffindor, the house of his parents, brothers and sister. But the Hat specifically states that Gryffindors usually have 'daring, nerve and chivalry'.
And this is why Hermione does not fit into Ravenclaw, since she lacks their creativity of thought. When you also add in her fearlessness and her strong convictions about right and wrong, which are inherently Gryffindor traits, then there was even less of a chance she'd end up wearing blue and bronze.
In fact, the Sorting Hat took "four minutes to sort her into one or the other – nearly resulting in a 'Hatstall', which is when the Sorting Hat takes more than five minutes to sort a student." However, it was very much obvious that Hermione preferred Gryffindor, which is clearly seen in the film when she sighs in ...
The Hat considered putting Hermione in Ravenclaw but Dumbledore manipualted it because he wanted the brightest witch/wizard to ve a friend of Harry to help him in his Quest.
Albus ended up in Slytherin because he couldn't stop thinking about ending up in Slytherin, and so the Sorting Hat couldn't grasp anything other than his thoughts about being in Slytherin.
Her real parents were Daneel and Dean Novak, Pureblooded wizards. Turns out Daneel was Tom Riddles younger sister, Daneel Riddle. Of course, the Riddles were related to Salzar Slytherin himself, and this made Hermione the living heir of Slytherin.
He actually asked the Sorting Hat to place him in Hufflepuff, as he was intimidated by Gryffindor's reputation for bravery, but the Sorting Hat didn't agree. They debated it for so long, that he was close to being what is known as a Hatstall, which is a term for any student whose Sorting takes longer than five minutes.
In one of the later books, Hermione even makes mention of this by stating that the Sorting Hat was heavily leaning toward placing her in Ravenclaw. In the end, the Sorting Hat firmly recognized her bold courage over her intellect and decided to place her in Gryffindor.
She's seen as a bit absent-minded, is easily distracted, and is extremely eccentric in both her disposition and general outward appearance. But that's what makes her a perfect Ravenclaw. She loves learning, but unlike many of her housemates (or Hermione, for that matter), she can never know enough.
He would have been more than welcome in Ravenclaw house. He was sorted into Slytherin because his mother was sorted there, and we all know the sorting hat takes your opinion into account. As a half blood, he was only exposed to the death eaters, and blood status seniority because he was in Slytherin house.
She is perceptive
Ravenclaws are perceptive, and Luna noticed all kinds of things others didn't during her time at Hogwarts. There was that time she explained Ron in one sentence: 'He says very funny things sometimes, doesn't he?
Harry would have been internally conflicted if he had been Sorted into Slytherin. Although he still would have felt that Hogwarts was the only place he had ever belonged, he might have felt wary forming relationships with the children of Death Eaters.
At the core, Harry's reasons for not wanting to be in Slytherin were due to all the negative stories he had heard from Ron (his to-be best friend) and Hagrid (his first wizard friend). Besides, he had also had a distasteful first encounter with Draco (a Slytherin hopeful).
Although Ron is a pure-blood, he is not exactly proud of it, and so it is not his blood heritage alone which makes him a suitable candidate for Slytherin house.
Moaning Myrtle
Born in the late 1920s to Muggle parents, Myrtle Warren started her Hogwarts life in the early 1940s, where she was sorted into Ravenclaw. She had no friends, and was bullied relentlessly because of her glasses and acne. But she would soon have all of eternity to get her own back.
Even J.K. Rowling says that Hufflepuff is her favorite House. It's produced the fewest Dark wizards of all four Houses. Hufflepuffs are down-to-earth. Literally, their House colors represent wheat and dirt, symbolizing their humility (rather than the precious metal secondary colors of the other Houses).
Poor Harry certainly had his fair share of it over the years, and no one inspired more survivor's guilt in him than Hufflepuff Cedric Diggory. We pose that Cedric's death is the main reason Harry never wanted to visit Hufflepuff.
The only quality she shares with Salazar Slytherin is being a dark wizard. Bellatrix actually belongs in Hufflepuff. She is fiercely loyal to Voldemort, standing by his side the entire time. She also waited for his return while stuck in Azkaban with the patience only a Hufflepuff could have.
The Heir of Slytherin turns out to be Ginny Weasley, who is being controlled via a magical diary that once belonged to Tom Riddle, AKA Voldemort.
Albus Potter was placed in Slytherin House because he wanted to be with Scorpius Malfoy, his first friend in the Hogwarts Express. Also, the Sorting Hat saw that he would do good in Slytherin, like it did to Harry, but the change is that he wanted to be in Slytherin, so he was put in Slytherin, unlike his father.
He is cunning
Slytherins are a cunning lot, and there are all kinds of examples of Albus Potter using his wiles to come up with schemes and plans worthy of any member of Salazar's house throughout Harry Potter and the Cursed Child.