The Wire - This isnt really a tv series, its 5 twenty hour long movies. It draws you in and is in incredibly addictive, clever and very realistic.
Community - Started watching it last week. I've never laughed so much. Funniest and most creative show on.
Greek - Was a pleasant suprise, watched the pilot with no real hopes but the character progression was awesome and was genuinely sad to see it end in march.
Prison Break - I watch everything I can find related to prisons, they fascinate me, the first series was incredible and quite clever.
The Walking Dead - This show is a mother****er. 6 ****ing episodes!? I cant wait for the rest of the season and its killing me waiting.
Torchwood - I loved this, mainly for John Barrowman but it was one of the only tv shows I actually watched on the tele as opposed to torrenting/streaming.
Oz - Just awesome.