One thing I've noticed about these Taiwanese mystery thriller dramas is that it's not necessarily about the whodunnit or about blowing your mind with plot twists. It's about making social commentary through the eyes of different characters. Copycat Killer did a really good job of that.

Don't get me wrong, I still really enjoyed the mystery element, but I realized I shouldn't overthink the actions of different characters and waste my time trying to figure out who did it. Instead, the drama made me think about the killer's motivations and psychology, and most of all how the media and the rest of the public enabled it.

This is a really character-driven (as opposed to plot-driven) story; if someone keeps those things in mind, I think they'll really enjoy this one.