I enjoyed every minute of this drama for its colourful cast of characters, its stupid humour and its unique premise. But not everyone will, and it's important to go into Psychopath Diary with a very clear mindset if you want to enjoy it.

I'll skip an overview of the premise and jump straight to the meat of the controversy: the plot. Psychopath Diary is, essentially, a black comedy. It's really important to keep that in mind as you watch it because if you go into it expecting a dark, psychological thriller or a fascinating take on the premise, you're going to come out of this show having watched something you weren't looking for. This show is a comedy. It never wants to be more. There's character growth, there are heartwarming moments and a lot of really fun, engaging interactions within a cast that somehow managed to keep me, personally, loving every character. But the gritty psychology that a lot of people went into the drama looking for is not here.

I do agree that, had the writers taken a different route, the drama could have been so much more interesting. The plot plays it safe, for the most part, especially at the end. But if the drama went down a darker path, it wouldn't have been the story they were going for. Yoon Shi Yoon is an actor that relies on comedy and exaggeration. I think he plays his 'psychopath mode' role very well, but he's not the actor that would have been chosen had they intended the series to be a dark thriller. He's too bubbly, too likeable for a role like that. But for what the drama IS, a cute, heartwarming comedy with a thriller premise, they couldn't have chosen anyone better.

The cast is amazing. Everyone played their roles well, I fell in love with all of the characters, and even when the writing takes a few dips here and there in quality, they manage to make it enjoyable enough that I don't care. Off the top of my head, I can't think of any actor that felt jarring or any performances that were done poorly. This drama introduced me to Yoon Shi Yoon who I've found to be thoroughly enjoyable in the other roles that he's played. It was also the first time I saw Park Sung Hoon in a drama and he was amazing as a serial killer, so I'll definitely be taking a look at his other roles. Jung in Sun as Bo Kyung was the perfect compliment to the trainwreck that was Dong Shik. But aside from the main cast, everyone did a great job too. My favourite part of this drama is by far the amazing actors that brought it to life.

The plot, with its interesting premise, is both a strength and a weakness. It promises a lot of things at the beginning that it doesn't deliver through to the end, which I know is the biggest complaint that people have and I fully agree that it's an issue. But what it does give us, so long as you're able to go with the flow, is a fun story with a lot of long-standing jokes, character bonding, and a good look into who this pushover salaryman Dong Shik is and how he grows into a stronger person. So, I'm able to somewhat forgive its faults in favour of the enjoyment that I got out of it.

TL;DR: Psychopath Diary is a fun, engaging comedy with thriller aspects. It is NOT a psychological thriller. Going into the drama knowing that is critical to your enjoyment of it. The writing is nothing revolutionary, but it's enjoyable. The cast is amazing, everyone is fun to watch, and the soundtrack is perfect. But if you're looking for a drama that tackles tough issues like what makes a person who they are, how pressure and misconception can change someone, or a good man's slow descent into murder, you'll have to wait. The drama you're looking for isn't here yet, but maybe with Psychopath Diary paving the way, we'll see it in the future.

Until then, enjoy watching this stupid, pushover salaryman as he tries to keep his life together.