From a story point of view, lyrics can help or hinder a story. They can help by giving a feel for the scene, and can richen emotion. They can also date a story quickly, turn readers off because they don't like the song, and can cheapen a scene by putting in a superficial/emo mood depending on the song. Because the lyrics might be considered sappy and/or unrealistic, readers might roll their eyes. If you try to please them by poking a bit of fun at the song, then you'll turn away readers who love the song. You can also have a lovely character-driven story, fantastic plot, could be read by a wide variety of people, and the song sticks it in one category that's considered lower-quality.
I personally consider lyrics more trouble than their worth. Between the way it can date the story and how it can segment a story into a category when the story really doesn't deserve to be segmented in there.
A writer is a world trapped in a person— Victor Hugo
Ink is blood. Paper is bandages. The wounded press books to their heart to know they're not alone.
