omg i don’t have a ton of draco headcanons since he’s so prominent in the book but i’ll give you 3

1. when he was growing up he liked to talk to the house elves and when he learned his family’s ideals, he refused to even acknowledge any of the house elves because he didn’t want to treat them poorly (this is when he’s like 8 yrs old)

2. he was (is) a spoiled brat and every time him and his mum would go shopping he’d demand new robes/shoes/etc. narcissa dealt with way too many tantrums when he got turned down.

3. he always saw astoria as daphne’s annoying little sister that wanted to come to slytherin parties and such but when they met again when they were adults, draco had no clue it was astoria until after they danced at a banquet. he was smitten then (and tried to hide it behind his hard ass cover)