I mostly agree with this as quality distinctions between very good shows is always a matter of opinion. However, what separates BB from the top tier pack like The Wire, Sopranos or Deadwood is the writing. There's no real way around it nor any way to deny it. Most of the characters are cardboard and some of the plot points are just purely incoherent and borderline retarded (the airplane crash springs to mind, lol).
The Wire, Deadwood, Sopranos, Berlin Alexanderplatz, Dekalog and Band Of Brothers. That's the god tier, basically. Then you have Mad Men, Boardwalk Empire, Six Feet Under, Game Of Thrones, The Pacific, the first 4 seasons of West Wing and some other shows which are incredible, and then a slight notch down from those you have Breaking Bad as well as many other greats like Rome, Oz, The Shield, Battlestar Galactica and so on.
One needs to remind oneself that one's favourite isn't necessarily the same as the one you think is better. For example, my fav tv show ever is Battlestar Galactica, by far. I enjoyed it the most out of everything I've ever watched. But there's absolutely no doubt in my mind that it's probably the worst show I mentioned in my post. Me liking it and how good it is are 2 separate concepts. One is completely subjective, whilst the other one is quite objective, to a certain degree. I mean, it's absolutely impossible to deny that The Wire is, aside from 2 or 3 small and very specific gripes, as near perfect as a show can get (amazing writing, amazing story, based on a true story, social commentary runs rampant in a good way, very nice acting... fantastic pace and narrative... it's pretty undeniable).