Those songs can be catchy, funny, inspiring, beautiful and whatnot.
You can love them, you can hate them, you can just think: "Why am I even listening to this?"
Those songs can be anything. No explanations are necessary, but you can add them if you want.
To start off, here's what I repeatedly hear at the moment:
Usually I don't listen to Kpop very often, but this song goes so well with studying and it just sounds smooth.