I think part of the reason any character is hard to depict is that when each of us read a novel/story, we all have different views on how we interpret a character. Therefore, each actor/actress that is given a role has to take that into consideration as well. Also, since these famous JY characters have been portrayed by soooo many different people, each time the actors/actresses try to give a different take to portraying the characters. It is also hard to portray characters that are more introverted as well...
I find it so strange that Ken dislikes Yeung Gor so much but talks about him so much... What is that all about??