breaking bad only comes alive starting at season 4, if you can survive the first 3 seasons then u are good to go

best series:

1. Game of Thrones
2. true detective
3. Sherlock
4. Fargo

^^
Add on to storm's list:

1) House of Cards
2) Mad Men
3) Boardwalk Empire

Warning: All shows listed will significantly raise the viewer's expectations on other TV series.

from me, older series would be
1) the sopranos
2) the shield
3) the wire

what else

walking dead (TWD) is the STUPIDEST series ever made, you are better off watching everything else first, last resort only go watch TWD

anyway, like some suggested here, House of Cards is also excellent (if u r into that kind of thing). The Newsroom is also great, and i will also suggest Banshee if you are looking into something with lots of nudity, hot girls and
violence.

for crime drama, u might be interested in The Closer and then Major Crimes (sequel to The Closer), it's one of the longest running crime series out there (after CSI Vegas)

for some lighthearted murder with some dark humor, try Dexter (although the ending sucks)

after u have finished everything suggested here, try out Stargate SG-1 if you are interested in sci-fi, it might be cheesy at first (with very VERY bad costumes) because it's a very low budget production in season 1 but after that it has evolved into the best sci-fi series of all time