Concur with many of these on the drama shows.
Sopranos, Breaking Bad, The Wire, all stand out for me, over many seasons too.
Band of Brothers = amazing.
Also loved the first 3 seasons of Homeland, though can't see the next one(s) being any good.
And loving True Detective right now.
British drama, love Luther, of course, plus The Tunnel (UK version of The Bridge), plus really enjoyed Broadchurch.
For Comedy shows, it's all about Louie for me. Check out Louie CK, if you not seen him already, brilliant stand-up comic, and the show is awesome.
the new season starts very soon on Fox (next month). But i would highly recommend watching the first 3 before
Really into True Detective at the moment. Episode 5 so far, really gripping stuff.
Suits! Just hilarious.. could watch it for hours and hours...
There are too many good series out there. Most have been mentioned already. Would like to add Boardwalk Empire and Elementary to the list though.
Game of Thrones has to be up there as the best for me but following closely is Suits!