For me, this show is like the Con Air of TV series. It is action packed and entertaining, but it is absolutely bloody ridiculous! I thought that it was developing exceptionally well until the end of season 2. I found the moment when Walt let Jane die especially poignant, it really emphasised that the dark world he had slipped into had started to become him. Then they had to follow it up with the fanciful extravagance that was the plane crash. I felt the writers were trying to be clever by tying everything in, by emphasising the devastating cause and effect of Walt's actions, but it felt like a step into the absurd for me.
Season 3 & 4 really descended into implausible event after implausible event, there are too many to mention. Then you had Tuco's ridiculous cousins. They were absolutely laughable going round with that silver axe and their shoes with skulls and bones on them. I laughed out loud with incredulity in season 4 when Hector Salamanca returned to the old folks home from the police station and Walt just popped out of his toilet ready to rig his wheelchair with a bomb. Walt and Jesse would have been caught and killed a thousand times over in real life acting like they do in the series.
I just feel that this show could have been something really special. All the absurd events just kill any tension for me, you know that something ridiculous is always going to happen to save Walt and Jesse.
I guess season 5 is the money maker because some bad and final things are going to have to happen.