I like how they were ‘paired’ up because they are rivals (Gryffindor and Slytherin) and rivals ALWAYS make things interesting. Potter being the hero in the wizarding world as The Boy Who Lived and trying to learn every little thing about the wizarding world. Malfoy is the son of Lucius and Narcissa Malfoy, the Malfoys are well known in the wizarding world so Draco has to live up to the name. Then there’s the fact that Gryffindor and Slytherin are rivals at Hogwarts. It was really interesting and exciting to watch them grow up together in the books and movies.
I’ve a head-splitting headache so this shall be short.