I'm saving the last episodes of Breaking Bad to watch them in one burst rather than get annoyed at cliffhanger after cliffhanger each week. I really don't get why it was never shown by the UK TV channels.
A left-field selection for others to consider is Bates Motel. Seen a couple of episodes so far and it's quite good, lots of potential to understand how Norman Bates became the man he was. The kid they've got playing Norman has the telltales of Anthony Perkins right and just has the look, a very good casting choice by the show. I can see a few problems coming up though, it's going to be difficult to keep it fresh as we know what happens at the end of the story.
Then there's Fringe. An outstanding TV series that's a bit like Marmite for some. The first series can be a bit loose but from the second series onwards it's outstanding.
If you've never seen Dexter then there's a rare treat to find yourself being dragged into supporting a serial killer. I'm glad that it's on its final series now as it was getting a bit stale, knowing it's in its last few episodes adds a whole new impetus to the show.