How to evaluate Eason Chan's songs?

Every time I listen to Eason Chan's songs, I am very infected. The lyrics of many of his songs combined with his voice will really make people have a lot of associations, especially when a lyric or a melody in that song "drills" into your heart, you will unconsciously want to loop the single and listen to it all the time, reluctant to turn off the player. This is also the greatest charm of Eason Chan's songs.