Draco Malfoy and Blaise Zabini had been friends since they were children. Together they had grown up with the knowledge that anything other than Slytherin was unacceptable.
Ronald Weasley feared not being a Gryffindor. Red and Gold had littered the Weasley household though scarfs thrown over seats, pins scattered on the ground waiting to be stepped on, and crests on robes going through the wash every vacation. No matter how many times his parents assured him they would be proud of him no matter what, he knew they wanted him to a Gryffindor.
Neville Longbottom lived everyday with the fear of not being a wizard. His parents, the bravest people he knew, had been wizards and he wanted that. He wanted to make them proud even if they didn't know who he was. But no matter what the rest of his family did, they tried scaring him and yelling at him and god one cousin had even tried to enchant his powers into being, his powers weren't manifesting and that scared him when he was eight.
Ever since beginning her reading on Hogwarts, Hermione Granger had wanted to be a Ravenclaw. She had thought she would be one - all of the books depicted them as the thinkers and she was definitely a thinker. But, she mused sometimes; her thinking often led her to doing which she knew was definitely a Gryffindor trait. And then there were times when, locked alone in her bedroom staring the things she wouldn't see until next summer, she was just glad she was able to be in any house.
Harry Potter was just a normal boy for the first ten years of his life. But once he found out who he was, what he was, all he wanted was to be like his parents who had risked their lives for him. For the whole wizarding world. He wanted to be a Gryffindor like them.