The Wire, Boardwalk Empire, Sopranos, and OZ are classics to me
If you like sum shows about military life check out Generation Kill (same ppl who wrote The Wire)
Dexter is a great show with the exception of the last season
I'm enjoying a lot of the Marvel shows currently on Netflix including Luke Cage, Daredevil, Jessica Jones.. shit I just finished up The Punisher and that shyt was brolic to the max... that's my favorite of the bunch so far
Currently on the second season of Agents of S.H.I.E.L.D. and it's really dope as well (only supposed to become better)