From wiki-

Breaking Bad is an American television drama series created and produced by Vince Gilligan. Set and produced in Albuquerque, New Mexico, Breaking Bad is the story of Walter White (Bryan Cranston), a struggling high school chemistry teacher who is diagnosed with advanced lung cancer at the beginning of the series. He turns to a life of crime, producing and selling methamphetamine with a former student, Jesse Pinkman (Aaron Paul), with the aim of securing his family's financial future before he dies.[1]
Breaking Bad has received widespread critical acclaim, particularly for its writing and cinematography, in addition to the acting ability of its cast. It has won six Emmy Awards—including three consecutive wins for Lead Actor in a Drama Series for Cranston—in addition to numerous other awards and nominations.

I've just started watching this show and it is FRICKIN EPIC.

The main character is a Chemistry teacher, who, in his desperation, uses his knowledge to make drugs. He's also smart enough not to take unnecessary risks, and people think he's a chump, so nobody suspects him.

The theme of the show is basically about what people can do when consequences force their hand.
Performances are stellar, and the details of the story are really quite well researched.

This series has ended I hope you guys watched it till the end. I don't want to spoil it for those who haven't watched it yet. Walter gets increasingly bad-ass and the ending is sort of predictable but totally fitting.

Personally I don't think the ending was predictable. It could have easily gone hollywood and had a totally unrealistic ending instead of going with one where

ENDING SPOILER:

The other theory is that the real ending of the series is the second last episode and not the last one. The last one is just a fantasy that's all in his mind, according to some people. Because everything he does goes perfectly according to plan in spite of all the uncertainties.