It's an amazing series. I really liked seasons 1&2 but there were some episodes that got a bit formulaic:
1. Walt gets a brilliant idea
2. Jesse does something stupid and messes it up, they're in huge trouble
3. Walt fixes it with his chemistry superpowers.
Again, I did like them anyway, it was only a few episodes where I would go "yeah, yeah, I know how this'll turn out..."
But season 3 was different. Season 3 was flawless! It was like a cross between The Wire and a Beckett play. It was tense, and bizarre, and brutal, and surreal, and when I realized there'd be no more to watch for a whole year I was heartbroken!