Can you recommend a TV series based on these ones that I liked?

I don’t really follow a TV series while they air. I usually catch them on Netlix or Hulu via streaming or DVDs, and enjoy watching the episodes marathon style once I get hooked on the first episode.

Recently, I had fun watching Donwton Abbey’s 1st and 2nd season which I finished in less than three days. Before that I enjoyed Lost, Deadwood and Dexter. Based on these shows, do you have a good one you could recommend?