This anime is legitimately depressing. I like it, but even the little scene like the one where you just hear that one kid begging for his life as Armin watches in shock? That..... That messed em up for a good few days
The episode after they graduate and the Colossal Titans breaches Wall Rose. Then Erin, Amrin, Thomas, and three others are put into a group to help push the titans back, but everything goes bottoms up. It was a VERY depressing scene
I know the fear factor that not only that freaking thing can see over the walls, breaches them twice, can materialize out of nothing (I know what he really is but I won't say.....SPOILERS), and just his SHEER size. It was depressing and a really out of the blue and smile shattering moment.
That's a good hypothesis considering the Beast Titan basically trying to "test" humans. The fact that it's the most intelligent Titan capable of human speech gives it a whole new dimension. He shows interest in 3D maneuver gear and has great knowledge on human armament and how they combat the Titans. You can also say that the Armored Titan is on the same theory as the Colossal Titan.
I just finished Attack on Titan yesterday and I can't believe how many feels there are! Why must they make me suffer through all these feels! *sobs self into a puddle of tears* And then they had to go and do that whole Levi x Petra thing, and, oh my gosh!!! T^T I can't! *cries an ocean of tears and gets swept away in the current*