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Deadwood, hands down the best drama of the past few years. Although if you have virgin ears in the household you might not like horribly foul language. And I really do mean horribly motherf*(&$#ing foul. :)
 
My top picks would be:
-Buffy
-Angel
-Six Feet Under
-Kath and Kim (All 3 seasons)
-Black Books
-Star Trek Voyager/DS9
-Firefly
-We can be Heroes
 
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