If BB had ended after the first season, I don’t think anyone would praise it as the best show ever.
In my case, the parts that I think about, talk about and re-watch the most seem to be season 2 and the first half of season 5, plus the final three episodes.
Seasons 3 and 4 are great, too, don’t get me wrong, but they sometimes get too caught up in plotting, at least IMO. The show is at its best when it’s about the characters, not Rube Goldberg style plots. Again, IMO. I think that seasons 3 and 4 maybe could have been squeezed into a single season (although I’m bracing myself for a possibly justified pelting of tomatoes for saying that). As much as we like to describe BB as “the world’s longest movie”, the show isn’t always perfect when it comes to narrative economy. Which is, I suppose, partly because it wasn’t all planned out in advance, even though Walt’s basic story arch, from chemistry teacher to crime lord, is given in the premise.
Sometimes it does knock it out of the park, though. The first half of season 5, in particular, is just fantastic when it comes to pacing.
Even so, a remarkable thing about the show is how holistic is feels. Every episode of every season is always built upon what came before, and skipping ahead or watching out of order is simply out of the question. As I’ve said before, even the pilot echoes through the show until the end.

