Walking Dead is awesome! Ep5 is out, such a bad ass show.
Homeland is also great too!
Cant go wrong with 24 series if you haven seen it yet.
I watch Breaking Bad and Walking Dead, although most of my other shoes are comedy, unfortunately.
Better Off Ted
Blue Mountain State
Bones (+ Spinoff: The Finder)
Get Smart (Classic Series)
Lie To Me
The Ricky Gervais Show
I'd also reinforce Archer as something to watch.
Oh and all of James May's stuff from the BBC: Toy Stories, Man Lab, etc.