Black is a great series but it has a lot of twists and turns. Every time you think you've figured something out in this series, there's a turn. You'll definitely be kept on your toes. That's one of things that made the series so great. Every time something new was learned, I became more and more interested.
There were a lot of suspenseful and serious moments in the story but they did a good job adding comedy in at the right times to lighten the mood.
The reason I didn't give Black a higher score is I did skip through parts when I was watching. I think there were some parts that weren't really necessary for the story. It could have been cut down an episode or two in my opinion.
I will say I was happy with the ending though. I know there were some people that thought it was worse towards the end but I think they ended everything well.
Overall it's a great watch!