I recently really digged Vikings, True Detective (not really a series, stylewise) & Hannibal (sans the 2nd season BS finale).
Also really liked Dexter (Im one of the crazy ones who really liked the ending) & Breaking Bad (doh).
The Walking Dead was cool too, until I read the comics, which made the series a lot less cool out of the sudden. Still nice, apart from some really really weak spans of episodues in the last 2 seasons.
Sons of Anarchy was cool too, but the latest season (6?) lost me somewhere along the way for some reason.