Freshly mown grass reminds me of my home, new parchment reminds me of books, and spearmint toothpaste is super delicious smelling. Also, for some reason I think it would be extremely awkward to have my house smelling like Ron's hair.
Chamber of Secrets. I love this, Malfoy called Hermione a mudblood and the way Fred and George reacted is so fantastic! I think they protect her because they think of her as a sister, even before her and Ron dated/got married.