Intense, Violent, Emotional, Great Characters, Unpredictable Plot. Awesome.
I've never watched a show with such intensity before.
At the beginning, I knew very little about the world, but was thrown into an extremely violent situation where characters I already liked were threatened and dying, and humanity was being massacred in huge numbers.
The show only accelerated from there. Every episode I learned more about the world, and the stakes were ratcheted ever ...