Waverly likes her and her mother's crooked noses because she believes this distinctive feature makes them look devious and two-faced.
This shared physical characteristic is a point of pleasure for Waverly. She perceives the crookedness of their noses as symbolizing a cunning or strategic nature. While the terms "devious" and "two-faced" typically carry negative connotations in English, Waverly's appreciation suggests she sees this trait as reflecting a unique intelligence or an ability to navigate situations with a certain cleverness or hidden complexity, which she values.
