hard to say because all my favourite tv shows have finished & you cant really watch the same show over and over haha.
but ...
breaking bad ( recently re-watched it for first time and enjoying it just as much, altho it does make me cringe a little 2nd time round) orange is the new black( cant wait for season 4) dexter jessica jones utopia ( i really want to see season 3 even if there wont be one)