Delilah really enjoys alternative music because most of it is very upbeat. She likes to listen to music that has a beat. The reason she likes such upbeat music is because it makes her happy. She doesn't like slow music because most slow music is sad.
Just as different regions like to eat different foods, they prefer different music, too. Yes, people everywhere listen to Jay-Z, Macklemore, and Daft Punk -- it's just that some artists are played far more in certain parts of the country than in others.