I didn't watch this series when it came out but just recently binged up to the beginning of season 5. Loved it! Loved the characters.. loved the depth and heart of the plot lines.. I think I'm going to re-watch everything up until season 5 because as my enjoyment grew I realized I had missed bits and pieces that would improve my understanding.... I want to find and re-watch the part about survivors guilt because it was an epiphany for me and there were several other things that touched me and that I let go by too quickly. I might be putting off the final season because I don't want these people who have become my friends to be done with me... just realized that.