Storyline is far fetched and you have to have a bit of an imagination (yours truly,must have been those 60's), but I think most like it for the individual characters, sudden surprises and music, maybe the "gore" too. LOL!
Justified is the best one by far and I've been on that one for the 2 previous and this season. Gotta love Raylen Givens coolness and down home attitude. Just started on the Americans last week, looks good as well. Another good one is Do No Harm. That one is a modern day Jekyll & Hyde storyline.