I started this show because of the interesting premise (and partly because of Damon Lindelof). I love to watch movies and series with complicated storylines. The plot synopsis made me think it's a similar kind of show. A story about the sudden departure of 2% of the world's population; a mystery drama. But I soon realized that it's not about The Departed, it's about The Leftovers, as the name suggests. It isn't about getting answers to the "why"s or "how"s, it's about the lives of the people who have to survive without knowing what happened to the people they love, losing their loved ones, but not getting any closure.
And I'm so glad that this is what the show is about. I have never been so emotionally invested in a show and it's characters like this, ever before. It's the compelling storytelling, and the great acting, that makes it so good. Yes, we do not get satisfactory answers to all the questions raised, a lot of things don't seem logical; but it's not the kind of show to logically nitpicked. It's a show whose magic needs to be experienced to be fully appreciated.
This show has made me immensely sad. But I've never felt so happy to experience grief. This show is a genuine masterpiece. Not perfect, but it's the imperfection that makes it one of the best things ever put in television.