It was a combination of the Tailies becoming the focus when their were much better characters I wanted to know more about, plus TPTB not seeming to know where to go with the story. They would keep adding in "twists" but twists only take you so far. They also started out hinting there might be something supernatural, which, besides Dominic Monaghan being in it, was the main reason I gave it a shot.

I'm really starting to like the idea of limited series, in which we get a beginning, middle and end, without trying to drag it out for multiple seasons. Perhaps they could have another season, but with a different plotline to explore instead of beating a dead horse.