I cannot say less, at the beginning I didn't want to watch it, I thought: "another mix of gore and mystery with nothing good to make you think" (something like millennium) But finally I found at least three good reasons because the Collector it's one of the best shows 1- Unpredictable: from the first episode you'll never know when there's a "happy ending", the stories are very dark but there's no use of unnecessary violence, everything has a reason. 2- Deep: "The collector" it's not an "easy to watch show", there's always a message to think, some lesson, reflection about life and the way we live. 3- Epic: "the collector" talks about the inner war, I mean: the battle between light and darkness of every human being, for their own private desires, the price to make the dreams come true specially when we destroy the life of other people. The stories have a lot of symbols, lot of fantasy but the way the producers use it end in a very realistic message.
More reason: the acting it's good, the specially effects, and as I said in the first point: This is the kind of show where the producer don't have fear to make the necessary changes to make the stories better, so it's very unpredictable. It's not the kind of show about mysteries: you know from the beginning the rules of the main story but as the season goes you are gonna find the details, the true reasons a secrets of every character, everything from the autistic boy to the past of Morgan has a reason, and that make this a better far better than many things we usually find in the TV.
