Meh, I absolutely loved the pilot episode, but after that I slowly lost interest. I think I stopped watching altogether after season 3. Brian Cranston is undoubtedly a great actor and fun to watch, but some of the plot lines really drag.
A whole episode about Walter chasing a fly around the lab? WTF??
I also find all the Skylar hate amusing. Yeah, she's annoying and b!tchy and no fun to watch, but that's kind of Walter's fault... he is the one that is running a freaking meth-lab, and dragging his entire family into all kinds of unsavory sh!t and constantly putting them all in mortal danger.