*NO SPOILERS*
According to me, this particular plot and the way it ended, its screenplay, acting couldn't get any better. It is a must watch for every person out there who is/isn't interested in a dark realistic drama.
Every character is excellently developed with no good/bad virtues in them completely. You'd never have a liking just for one single character or the protagonist for the matter in the entire series. The screenplay takes care of addressing all the characters in well amount of depth.
Each and everything that happens in the episodes are addressed later thereby not leaving any cliffhangers or loose ends. Season 1 is a bit slow (relatively) but the story really takes pace after season 2. Season finale is epic and will also give you a reason to enjoy another series - Better call Saul - which is a spinoff prequel of Breaking Bad.
The actors of Breaking Bad have done a commendable job I must say, especially Bryan Cranston who plays the protagonist Walter White. The human emotions and human tendencies - which is the most essential part of the entire series - have been captured excellently which wouldn't have been possible without a decent acting.
Again, kudos to Vince Gilligan for providing us with such an epic series.
*PS:- make sure to watch easter eggs and unknown facts of Breaking Bad after completing the series*