Review of Attack on Titan
Mankind's extinction or extermination has been a thing for a while in all of the Sci-fi genre. The adrenaline of finding a way to escape or even face the threat to survive and prevale is what keeps us in a tension state, and you can only see yourself in that situation: "What would I even do if I was there?". Shingeki no Kyojin inmerses in a world where humans are close to extinction, and they are forced to be confined within walls. These walls protect them from their biggest threat: The Titans. The show's main hook is its pace, throwing at you lots of shock factor elementsat the beginning, and brings exposition and exploration of its own world, ideas and mythology at the right moment.
The anime also holds a very high production value. Its music and animation are some of the reasons why this anime is so popular.
I would say that if you're curious, watch the first episode, and if it catches you, go on. It is a really intense experience.