Kuroshitsuji (Black Butler)
Kuroshitsuji was the first anime I've seen in years. Long after my childhood I returned, frantically, to watching anime.
And I was lucky to chose start with this anime because in that time I didn't knew nothing about this or any other anime but the most common ones, however, this was the anime that I loved most. For a while I only had eyes for Kuroshitsuji, and still I do consider Kuroshitsuji as a major milestone of life.
I do not consider Kuroshitsuji only for that, but the whole context is brilliant. Other details that captivate me was the fact that it takes place in the Victorian Age, with medieval touches, men in suits, women in gorgeous gowns. There is mystery and love. There is everything I need and everything a good anime shall have.
Also has the best soundtrack anime I know.
In my point of view, Kuroshitsuji is a great anime in which fit perfectly in the context of my life and my heart.