victoro

May be we can distinguish them between "variety of skills" and "quality".

Eason must be the 1st in "variety of skills". You will like his style of "playing" his voice and the music. Yes, this is a kind of high quality as well.

For Hacken, we seldom see his "varity of skills". You can say that he is soft or without heart. But it doesn't mean that he lacks of it, its just his way to express his songs these years. Its another kind of mature and his own style. You couldn't find another one who can compatible with him in his field. For the quality, I guess everyone will agree that his live concert is equal to his CD. Its amazing and obviously not Eason and Leo Koo could compatible with.

For Leo Koo... I like his songs in 90s but not now. It seems that he always like to show his skills in front of those new singers and tell them he is good in singing. well.... he is not bad, but still a long way to go if he wanna reach the level of Hacken or Eason.