Then I binged BB after season 4 of BCS because I kept reading about the crossover characters and places.

I really like the relationship between Jimmy and Kim and one of the big mysteries is what will happen to Kim (as she's not in BB). I like the relationship between Jimmy and his brother Chuck. So many things show the changes in Jimmy's personality. But even at the end of season 5, Jimmy still has concern about right and wrong. He is not full Saul yet.

Plus there is Nacho and Lalo and Gus and Mike.

It's slow in the first few episodes — kind of like the second season of LOST. But if you stick with it, you get a lot of good backstory on BB.