Breaking Bad. Hands down. If you haven't watched it, watch it. I literally don't have words to describe it.
Breaking bad I HIGHLY recommend
Watching and devouring FRINGE right now. I like its evolutionary scale.
First season: "This is just another cop drama with some odd eerie aspects.."
Second Season: "Parallel World Theories Where?"
Third Season: "Messing with Timelines like a boss"
FRINGE is one of my all-time favorite TV shows. Right below Heroes
As for my recommendations, I highly suggest you watch Heroes. It's simply amazing, and you will be hooked so fast on it. Also I really enjoyed House of Cards as
@Jordan mentioned, really fantastic show there and I can't wait for season 3 to come out. American Horror Story is good if you are into horror. Trailer Park Boys is something I watch when I need some really good stupid funny laughs. Mad Men I have been into recently, the later seasons are actually a lot better than the early ones in my opinion. I could go on and on lol, there are so many good shows to watch on netflix