Let me first start by saying that I was very hesitant to watch AoT because of all of the mixed reviews it has. I've heard AoT be praised, and I've heard it be trashed. But fortunately, I can confidently say that it is such an incredible anime, and ANY anime fan should watch it as soon as possible!
Story: 10
For some reason, I've heard people say that AoT doesn't have a plot, but that is silly to say! That would be like watching a zombie movie and stating that the movie didn't have a plot. The whole point of AoT is to discover more about the titans, and, more importantly, eliminate all of the titans so that humans can live peacefully outside of the walls again. The plot is actually quite deep and heartfelt, and without spoiling anything, the supernatural twist in this anime is VERY creative and definitely surprised me.
Art: 10
The art style and overall animation in this anime is godly. This is probably the second best animation / art style of any anime I've seen, only being surpassed by One Punch Man for me. But this anime is so beautiful to look at because of the vibrant colors. Also, the titans look quite terrifying! The art definitely adds a LOT to the anime.
Sound: 10
Again, a masterpiece. The intros and outros are extremely catchy, and the overall soundtrack is beautiful, creepy, and unique. It definitely captures the scene of the moment effectively, and definitely makes you FEEL something. That definitely isn't an easy thing to do, but unsurprisingly, AoT nails it!
Character: 10
Okay... Here's where things really get real. The characters in this anime are so damn good. I'll mention a few of them, but won't reveal much about them because of spoilers. But trust me, a lot of the characters have heart-felt backstories, and they are all really easy to love. Also, the villains are really unique and interesting, since there is no specific or particular one.
Eren: Our main character that has a burning passion to kill titans, and to see all of the beautiful things that he has heard about outside of the walls. After all, it IS humanity's birthright. Decided long ago that he wanted to join the military.
Armin: Eren's best friend. An intelligent, passionate character who is always looking to protect the ones he loves.
Mikasa: Eren's adopted sister / best friend. A badass female lead who really knows how to get things done. Like Armin, she vows to always be by Eren's side.
Levi: Arguably the best and most badass character in AoT. He is a total neat freak and loves cleanliness, but doesn't play around when it comes to titans. Humanity's greatest soldier. You won't see much of him until later, but just keep this in mind.
Enjoyment: 10
All of these things combine to create the beautiful masterpiece known as Attack on Titan. There are very exciting and surprising moments that will put you on the edge of your seat. The pacing is great, and there aren't any boring moments. This is just one of those anime that you will want to binge watch because of how good it is, and also because it has quite a few cliffhangers.
Overall: 10
Of course I have to give this anime a solid 10. It's one of my favorite anime, after all. I think that there are some anime that are better, but this is still a masterpiece. I absolutely can't wait for Season 3. A lot has happened and I hope that the anime will have an excellent conclusion and the one that it deserves. Watch it. Ignore the haters that say that this anime is overrated, because in my opinion, it isn't. But you be the judge.